Rename HAS_NO_PLAIN_C to DONT_USE_SOFTWARE_CRYPTO

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 894ee78..a1b564f 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -4010,6 +4010,6 @@
  * Platform independent implementation for crypto algorithms.
  * Disable plain c implementation for AES.
  */
-//#define MBEDTLS_AES_HAS_NO_PLAIN_C /* Uncomment to disable plain c implementation of AES */
+//#define MBEDTLS_AES_DONT_USE_SOFTWARE_CRYPTO /* Uncomment to disable plain c implementation of AES */
 
 /** \} name SECTION: Module configuration options */