[AX.25]: Rename ax25_encapsulate to ax25_hard_header

Rename ax25_encapsulate to ax25_hard_header which these days more
accurately describes what the function is supposed to do.

Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/hamradio/hdlcdrv.c b/drivers/net/hamradio/hdlcdrv.c
index d2b2666..dacc768 100644
--- a/drivers/net/hamradio/hdlcdrv.c
+++ b/drivers/net/hamradio/hdlcdrv.c
@@ -701,7 +701,7 @@
 
 	s->skb = NULL;
 	
-	dev->hard_header = ax25_encapsulate;
+	dev->hard_header = ax25_hard_header;
 	dev->rebuild_header = ax25_rebuild_header;
 	dev->set_mac_address = hdlcdrv_set_mac_address;