tests: fs: nvs: add `mps2/an385` support

Add support for running the test with the simulated `mps2/an385` board.

Signed-off-by: Jordan Yates <jordan@embeint.com>
diff --git a/tests/subsys/fs/nvs/src/main.c b/tests/subsys/fs/nvs/src/main.c
index 3a9a41c..85aaf9f 100644
--- a/tests/subsys/fs/nvs/src/main.c
+++ b/tests/subsys/fs/nvs/src/main.c
@@ -8,11 +8,12 @@
  * This test is designed to be run using flash-simulator which provide
  * functionality for flash property customization and emulating errors in
  * flash operation in parallel to regular flash API.
- * Test should be run on qemu_x86 or native_sim target.
+ * Test should be run on qemu_x86, mps2_an385 or native_sim target.
  */
 
-#if !defined(CONFIG_BOARD_QEMU_X86) && !defined(CONFIG_ARCH_POSIX)
-#error "Run only on qemu_x86 or a posix architecture based target (for ex. native_sim)"
+#if !defined(CONFIG_BOARD_QEMU_X86) && !defined(CONFIG_ARCH_POSIX) &&                              \
+	!defined(CONFIG_BOARD_MPS2_AN385)
+#error "Run only on qemu_x86, mps2_an385, or a posix architecture based target (for ex. native_sim)"
 #endif
 
 #include <stdio.h>
diff --git a/tests/subsys/fs/nvs/testcase.yaml b/tests/subsys/fs/nvs/testcase.yaml
index 708fa28..c796cda 100644
--- a/tests/subsys/fs/nvs/testcase.yaml
+++ b/tests/subsys/fs/nvs/testcase.yaml
@@ -2,7 +2,9 @@
   tags: nvs
 tests:
   filesystem.nvs:
-    platform_allow: qemu_x86
+    platform_allow:
+      - qemu_x86
+      - mps2/an385
   filesystem.nvs.0x00:
     extra_args: DTC_OVERLAY_FILE=boards/qemu_x86_ev_0x00.overlay
     platform_allow: qemu_x86