usbnet: convert to netdev_tx_t

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/rtl8150.c b/drivers/net/usb/rtl8150.c
index bac8b77..d9f84f2 100644
--- a/drivers/net/usb/rtl8150.c
+++ b/drivers/net/usb/rtl8150.c
@@ -727,7 +727,8 @@
 	netif_wake_queue(netdev);
 }
 
-static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
+static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
+					    struct net_device *netdev)
 {
 	rtl8150_t *dev = netdev_priv(netdev);
 	int count, res;