[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/6pack.c b/drivers/net/hamradio/6pack.c
index 0b23022..9099986 100644
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -293,7 +293,7 @@
 {
 #ifdef CONFIG_INET
 	if (type != htons(ETH_P_AX25))
-		return ax25_encapsulate(skb, dev, type, daddr, saddr, len);
+		return ax25_hard_header(skb, dev, type, daddr, saddr, len);
 #endif
 	return 0;
 }