Merge pull request #13791 from Patater/default-random-seed-experimental

mbedtls: Don't attempt to use default_random_seed

Author: 0xc0170

connectivity/mbedtls/platform/inc/platform_mbed.h

@@ -21,7 +21,7 @@
 #ifndef __PLATFORM_MBED__H__
 #define __PLATFORM_MBED__H__
 
-#if (defined(FEATURE_PSA) && defined(MBEDTLS_ENTROPY_NV_SEED))
+#if (defined(FEATURE_EXPERIMENTAL_API) && defined(FEATURE_PSA) && defined(MBEDTLS_ENTROPY_NV_SEED))
 
 #include "default_random_seed.h"