Revert "[EFR32] Adding hardware acceleration for mbed TLS"

This reverts commit c0301b1.

Author: stevew817

features/mbedtls/platform/inc/platform_mbed.h

@@ -20,21 +20,3 @@
 #if defined(DEVICE_TRNG)
 #define MBEDTLS_ENTROPY_HARDWARE_ALT
 #endif
-
-#if defined(DEVICE_AES)
-#define MBEDTLS_AES_ALT
-#endif
-
-#if defined(DEVICE_SHA)
-#define MBEDTLS_SHA1_ALT
-#define MBEDTLS_SHA256_ALT
-#endif
-
-#if defined(DEVICE_ECC)
-#define MBEDTLS_ECP_DEVICE_ALT
-#define MBEDTLS_ECP_DOUBLE_JAC_ALT
-#define MBEDTLS_ECP_DEVICE_ADD_MIXED_ALT
-#define MBEDTLS_ECP_NORMALIZE_JAC_ALT
-#define MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT
-#define MBEDTLS_MPI_MODULAR_DIVISION_ALT
-#endif