Enable invalid param test in ecdh.c

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

tests/suites/test_suite_ecdh.function

@@ -43,7 +43,7 @@ exit:
  * END_DEPENDENCIES
  */
 
-/* BEGIN_CASE depends_on:NOT_DEFINED */
+/* BEGIN_CASE */
 void ecdh_invalid_param( )
 {
     mbedtls_ecdh_context ctx;