net: dwc-xlgmac: fix xlgmac_xmit()'s return type

The method ndo_start_xmit() is defined as returning an 'netdev_tx_t',
which is a typedef for an enum type, but the implementation in this
driver returns an 'int'.

Fix this by returning 'netdev_tx_t' in this driver too.
Signed-off-by: NLuc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/synopsys/dwc-xlgmac-net.c

@@ -697,7 +697,7 @@ static void xlgmac_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 	schedule_work(&pdata->restart_work);
 }
 
-static int xlgmac_xmit(struct sk_buff *skb, struct net_device *netdev)
+static netdev_tx_t xlgmac_xmit(struct sk_buff *skb, struct net_device *netdev)
 {
 	struct xlgmac_pdata *pdata = netdev_priv(netdev);
 	struct xlgmac_pkt_info *tx_pkt_info;