net: hns3: Fix return value error in hns3_reset_notify_down_enet

When doing reset, netdev has not been brought up is not an error,
it means that we do not need do the stop operation, so just return
zero.

Fixes: 76ad4f0e ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NSalil Mehta <salil.mehta@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

@@ -3396,7 +3396,7 @@ static int hns3_reset_notify_down_enet(struct hnae3_handle *handle)
 	struct net_device *ndev = kinfo->netdev;
 
 	if (!netif_running(ndev))
-		return -EIO;
+		return 0;
 
 	return hns3_nic_net_stop(ndev);
 }