[X25]: Restore skb->dev setting in x25_type_trans().

Noticed by Pascal Schlafer.
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/x25device.h

@@ -8,6 +8,7 @@
 static inline __be16 x25_type_trans(struct sk_buff *skb, struct net_device *dev)
 {
 	skb->mac.raw = skb->data;
+	skb->dev = dev;
 	skb->pkt_type = PACKET_HOST;
 	
 	return htons(ETH_P_X25);