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/net/netrom/nr_dev.c b/net/netrom/nr_dev.c
index c7b7838..7aa11b0 100644
--- a/net/netrom/nr_dev.c
+++ b/net/netrom/nr_dev.c
@@ -169,7 +169,7 @@
 	return 0;
 }
 
-static int nr_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t nr_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct net_device_stats *stats = &dev->stats;
 	unsigned int len = skb->len;