Merge pull request #14741 from boraozgen/trng-def-checks

MbedTLS: Add definition checks for TRNG

Author: 0xc0170

connectivity/mbedtls/platform/inc/platform_mbed.h

@@ -40,8 +40,10 @@
 #endif  // (defined(FEATURE_PSA) && defined(MBEDTLS_ENTROPY_NV_SEED))
 
 #if DEVICE_TRNG
+#if !defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
 #define MBEDTLS_ENTROPY_HARDWARE_ALT
 #endif
+#endif
 
 #if defined(MBEDTLS_CONFIG_HW_SUPPORT)
 #include "mbedtls_device.h"