Enable invalid param test in sha256

Signed-off-by: Tuvshinzaya Erdenekhuu <tuvshinzaya.erdenekhuu@arm.com>

tests/suites/test_suite_shax.function

@@ -18,7 +18,7 @@ void mbedtls_sha1( data_t * src_str, data_t * hash )
 }
 /* END_CASE */
 
-/* BEGIN_CASE depends_on:MBEDTLS_SHA256_C:NOT_DEFINED */
+/* BEGIN_CASE depends_on:MBEDTLS_SHA256_C */
 void sha256_invalid_param( )
 {
     mbedtls_sha256_context ctx;