Add SPDX-License-Identifier: MIT to MIT licensed files.
diff --git a/portable/IAR/ARM_CM33/non_secure/port.c b/portable/IAR/ARM_CM33/non_secure/port.c
index 7a066ae..5c5c7d8 100644
--- a/portable/IAR/ARM_CM33/non_secure/port.c
+++ b/portable/IAR/ARM_CM33/non_secure/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/non_secure/portasm.h b/portable/IAR/ARM_CM33/non_secure/portasm.h
index 5916f43..4392259 100644
--- a/portable/IAR/ARM_CM33/non_secure/portasm.h
+++ b/portable/IAR/ARM_CM33/non_secure/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/non_secure/portasm.s b/portable/IAR/ARM_CM33/non_secure/portasm.s
index a66a958..25135f5 100644
--- a/portable/IAR/ARM_CM33/non_secure/portasm.s
+++ b/portable/IAR/ARM_CM33/non_secure/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/non_secure/portmacro.h b/portable/IAR/ARM_CM33/non_secure/portmacro.h
index a00e840..dcdd0f6 100644
--- a/portable/IAR/ARM_CM33/non_secure/portmacro.h
+++ b/portable/IAR/ARM_CM33/non_secure/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/secure/secure_context.c b/portable/IAR/ARM_CM33/secure/secure_context.c
index 2b065cf..a0a85bd 100644
--- a/portable/IAR/ARM_CM33/secure/secure_context.c
+++ b/portable/IAR/ARM_CM33/secure/secure_context.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/secure/secure_context.h b/portable/IAR/ARM_CM33/secure/secure_context.h
index 03a9e4d..1167fbd 100644
--- a/portable/IAR/ARM_CM33/secure/secure_context.h
+++ b/portable/IAR/ARM_CM33/secure/secure_context.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/secure/secure_context_port.c b/portable/IAR/ARM_CM33/secure/secure_context_port.c
index 9da1aaf..9994032 100644
--- a/portable/IAR/ARM_CM33/secure/secure_context_port.c
+++ b/portable/IAR/ARM_CM33/secure/secure_context_port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/secure/secure_context_port_asm.s b/portable/IAR/ARM_CM33/secure/secure_context_port_asm.s
index 86322ff..b4934ad 100644
--- a/portable/IAR/ARM_CM33/secure/secure_context_port_asm.s
+++ b/portable/IAR/ARM_CM33/secure/secure_context_port_asm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/secure/secure_heap.c b/portable/IAR/ARM_CM33/secure/secure_heap.c
index ba90dba..6752f91 100644
--- a/portable/IAR/ARM_CM33/secure/secure_heap.c
+++ b/portable/IAR/ARM_CM33/secure/secure_heap.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/secure/secure_heap.h b/portable/IAR/ARM_CM33/secure/secure_heap.h
index 5e39834..29b00d1 100644
--- a/portable/IAR/ARM_CM33/secure/secure_heap.h
+++ b/portable/IAR/ARM_CM33/secure/secure_heap.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/secure/secure_init.c b/portable/IAR/ARM_CM33/secure/secure_init.c
index 84b9c7d..1fa482a 100644
--- a/portable/IAR/ARM_CM33/secure/secure_init.c
+++ b/portable/IAR/ARM_CM33/secure/secure_init.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/secure/secure_init.h b/portable/IAR/ARM_CM33/secure/secure_init.h
index 48559ae..70cbf34 100644
--- a/portable/IAR/ARM_CM33/secure/secure_init.h
+++ b/portable/IAR/ARM_CM33/secure/secure_init.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to

diff --git a/portable/IAR/ARM_CM33/secure/secure_port_macros.h b/portable/IAR/ARM_CM33/secure/secure_port_macros.h
index b6efa1e..6d05b25 100644
--- a/portable/IAR/ARM_CM33/secure/secure_port_macros.h
+++ b/portable/IAR/ARM_CM33/secure/secure_port_macros.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>

  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.

  *

+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

  * this software and associated documentation files (the "Software"), to deal in

  * the Software without restriction, including without limitation the rights to