Return error if algorithm is not hash-then-sign for psa_sign_message

Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 5758539..519c70a 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -2692,10 +2692,7 @@
                     signature, signature_length );
     }
 
-    return psa_driver_wrapper_verify_hash(
-                attributes, key_buffer, key_buffer_size,
-                alg, input, input_length,
-                signature, signature_length );
+    return( PSA_ERROR_NOT_SUPPORTED );
 }
 
 psa_status_t psa_verify_message( mbedtls_svc_key_id_t key,