net: sparx5: fix error return code in sparx5_register_notifier_blocks()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: d6fce514 ("net: sparx5: add switching support")
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c

@@ -485,8 +485,10 @@ int sparx5_register_notifier_blocks(struct sparx5 *s5)
 		goto err_switchdev_blocking_nb;
 
 	sparx5_owq = alloc_ordered_workqueue("sparx5_order", 0);
-	if (!sparx5_owq)
+	if (!sparx5_owq) {
+		err = -ENOMEM;
 		goto err_switchdev_blocking_nb;
+	}
 
 	return 0;