ksz884x: convert to netdev_tx_t

Convert TX hook to netdev_tx_t type

Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ksz884x.c b/drivers/net/ksz884x.c
index c80ca64..4568b6f 100644
--- a/drivers/net/ksz884x.c
+++ b/drivers/net/ksz884x.c
@@ -4854,7 +4854,7 @@
  *
  * Return 0 if successful; otherwise an error code indicating failure.
  */
-static int netdev_tx(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t netdev_tx(struct sk_buff *skb, struct net_device *dev)
 {
 	struct dev_priv *priv = netdev_priv(dev);
 	struct dev_info *hw_priv = priv->adapter;