[NET]: Introduce and use print_mac() and DECLARE_MAC_BUF()

This is nicer than the MAC_FMT stuff.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/appletalk/aarp.c b/net/appletalk/aarp.c
index e9a51a6..92cd749 100644
--- a/net/appletalk/aarp.c
+++ b/net/appletalk/aarp.c
@@ -997,6 +997,7 @@
 	struct aarp_iter_state *iter = seq->private;
 	struct aarp_entry *entry = v;
 	unsigned long now = jiffies;
+	DECLARE_MAC_BUF(mac);
 
 	if (v == SEQ_START_TOKEN)
 		seq_puts(seq,
@@ -1007,13 +1008,7 @@
 			   ntohs(entry->target_addr.s_net),
 			   (unsigned int) entry->target_addr.s_node,
 			   entry->dev ? entry->dev->name : "????");
-		seq_printf(seq, "%02X:%02X:%02X:%02X:%02X:%02X",
-			   entry->hwaddr[0] & 0xFF,
-			   entry->hwaddr[1] & 0xFF,
-			   entry->hwaddr[2] & 0xFF,
-			   entry->hwaddr[3] & 0xFF,
-			   entry->hwaddr[4] & 0xFF,
-			   entry->hwaddr[5] & 0xFF);
+		seq_printf(seq, "%s", print_mac(mac, entry->hwaddr));
 		seq_printf(seq, " %8s",
 			   dt2str((long)entry->expires_at - (long)now));
 		if (iter->table == unresolved)