fec: convert TX hook to netdev_tx_t

Convert TX hook return value to netdev_tx_t
Signed-off-by: NDenis Kirjanov <dkirjanov@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/fec.c

@@ -210,7 +210,7 @@ static void fec_stop(struct net_device *dev);
 /* Transmitter timeout */
 #define TX_TIMEOUT (2 * HZ)
 
-static int
+static netdev_tx_t
 fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct fec_enet_private *fep = netdev_priv(dev);