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/catc.c b/drivers/net/usb/catc.c
index 7abdc4a..0ffc0c6 100644
--- a/drivers/net/usb/catc.c
+++ b/drivers/net/usb/catc.c
@@ -411,7 +411,8 @@
 	spin_unlock_irqrestore(&catc->tx_lock, flags);
 }
 
-static int catc_start_xmit(struct sk_buff *skb, struct net_device *netdev)
+static netdev_tx_t catc_start_xmit(struct sk_buff *skb,
+					 struct net_device *netdev)
 {
 	struct catc *catc = netdev_priv(netdev);
 	unsigned long flags;