sfc: Correctly initialise reset_method in siena_test_chip()

Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>

drivers/net/ethernet/sfc/siena.c

@@ -170,7 +170,7 @@ static const struct efx_nic_register_test siena_register_tests[] = {
 
 static int siena_test_chip(struct efx_nic *efx, struct efx_self_tests *tests)
 {
-	enum reset_type reset_method = reset_method;
+	enum reset_type reset_method = RESET_TYPE_ALL;
 	int rc, rc2;
 
 	efx_reset_down(efx, reset_method);