convert hamradio drivers to netdev_txreturnt_t

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/hamradio/hdlcdrv.c b/drivers/net/hamradio/hdlcdrv.c
index 16b060b..0013c40 100644
--- a/drivers/net/hamradio/hdlcdrv.c
+++ b/drivers/net/hamradio/hdlcdrv.c
@@ -399,7 +399,8 @@
  * ===================== network driver interface =========================
  */
 
-static int hdlcdrv_send_packet(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t hdlcdrv_send_packet(struct sk_buff *skb,
+				       struct net_device *dev)
 {
 	struct hdlcdrv_state *sm = netdev_priv(dev);