Merge pull request #14850 from OpenNuvoton/nuvoton_psa_nv_seed

PSA: Fix compile error with NV seed

Author: Patater

platform/FEATURE_EXPERIMENTAL_API/FEATURE_PSA/TARGET_MBED_PSA_SRV/test_abstraction_layers/pal/pal_mbed_os_intf.cpp

@@ -31,6 +31,8 @@
 
 #include "lifecycle.h"
 
+#include "mbedtls/entropy.h"
+
 #define TEST_STACK_SIZE 8192
 #define TEST_KEY_ID_VALUE 17