Sort symbol lists in alphabetical order

They're easier to maintain that way. The old lists were partly
alphabetized, partly based on config.h order, and partly in the order
in which symbols had been added to config.pl.
diff --git a/scripts/config.py b/scripts/config.py
index c19222a..a1d932f 100755
--- a/scripts/config.py
+++ b/scripts/config.py
@@ -164,29 +164,29 @@
     if re.search(r'PLATFORM_[A-Z0-9]+_ALT', name):
         return True
     if name in [
-            'MBEDTLS_TEST_NULL_ENTROPY',
             'MBEDTLS_DEPRECATED_REMOVED',
+            'MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED',
+            'MBEDTLS_ECP_RESTARTABLE',
             'MBEDTLS_HAVE_SSE2',
-            'MBEDTLS_PLATFORM_NO_STD_FUNCTIONS',
-            'MBEDTLS_MEMORY_DEBUG',
             'MBEDTLS_MEMORY_BACKTRACE',
             'MBEDTLS_MEMORY_BUFFER_ALLOC_C',
+            'MBEDTLS_MEMORY_DEBUG',
+            'MBEDTLS_NO_64BIT_MULTIPLICATION',
             'MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES',
             'MBEDTLS_NO_PLATFORM_ENTROPY',
-            'MBEDTLS_RSA_NO_CRT',
-            'MBEDTLS_REMOVE_ARC4_CIPHERSUITES',
+            'MBEDTLS_NO_UDBL_DIVISION',
+            'MBEDTLS_PKCS11_C',
+            'MBEDTLS_PLATFORM_NO_STD_FUNCTIONS',
+            'MBEDTLS_PSA_CRYPTO_SPM',
+            'MBEDTLS_PSA_INJECT_ENTROPY',
             'MBEDTLS_REMOVE_3DES_CIPHERSUITES',
+            'MBEDTLS_REMOVE_ARC4_CIPHERSUITES',
+            'MBEDTLS_RSA_NO_CRT',
             'MBEDTLS_SSL_HW_RECORD_ACCEL',
+            'MBEDTLS_TEST_NULL_ENTROPY',
             'MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3',
             'MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION',
             'MBEDTLS_ZLIB_SUPPORT',
-            'MBEDTLS_PKCS11_C',
-            'MBEDTLS_NO_UDBL_DIVISION',
-            'MBEDTLS_NO_64BIT_MULTIPLICATION',
-            'MBEDTLS_PSA_CRYPTO_SPM',
-            'MBEDTLS_PSA_INJECT_ENTROPY',
-            'MBEDTLS_ECP_RESTARTABLE',
-            'MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED',
     ]:
         return False
     if name.endswith('_ALT'):
@@ -202,22 +202,22 @@
 def keep_in_baremetal(name):
     """Rules for symbols in the "baremetal" configuration."""
     if name in [
-            'MBEDTLS_NET_C',
-            'MBEDTLS_TIMING_C',
-            'MBEDTLS_FS_IO',
+            'MBEDTLS_DEPRECATED_WARNING',
             'MBEDTLS_ENTROPY_NV_SEED',
+            'MBEDTLS_FS_IO',
+            'MBEDTLS_HAVEGE_C',
             'MBEDTLS_HAVE_TIME',
             'MBEDTLS_HAVE_TIME_DATE',
-            'MBEDTLS_DEPRECATED_WARNING',
-            'MBEDTLS_HAVEGE_C',
-            'MBEDTLS_THREADING_C',
-            'MBEDTLS_THREADING_PTHREAD',
             'MBEDTLS_MEMORY_BACKTRACE',
             'MBEDTLS_MEMORY_BUFFER_ALLOC_C',
-            'MBEDTLS_PLATFORM_TIME_ALT',
+            'MBEDTLS_NET_C',
             'MBEDTLS_PLATFORM_FPRINTF_ALT',
-            'MBEDTLS_PSA_ITS_FILE_C',
+            'MBEDTLS_PLATFORM_TIME_ALT',
             'MBEDTLS_PSA_CRYPTO_STORAGE_C',
+            'MBEDTLS_PSA_ITS_FILE_C',
+            'MBEDTLS_THREADING_C',
+            'MBEDTLS_THREADING_PTHREAD',
+            'MBEDTLS_TIMING_C',
     ]:
         return False
     return True