convert hamradio drivers to netdev_txreturnt_t

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/hamradio/yam.c

@@ -594,7 +594,8 @@ static void ptt_off(struct net_device *dev)
 	outb(PTT_OFF, MCR(dev->base_addr));
 }
 
-static int yam_send_packet(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t yam_send_packet(struct sk_buff *skb,
+					 struct net_device *dev)
 {
 	struct yam_port *yp = netdev_priv(dev);