[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/ieee80211/softmac/ieee80211softmac_wx.c b/net/ieee80211/softmac/ieee80211softmac_wx.c
index 5742dc8..8e8ad08 100644
--- a/net/ieee80211/softmac/ieee80211softmac_wx.c
+++ b/net/ieee80211/softmac/ieee80211softmac_wx.c
@@ -72,6 +72,7 @@
 	struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
 	struct ieee80211softmac_auth_queue_item *authptr;
 	int length = 0;
+	DECLARE_MAC_BUF(mac);
 
 check_assoc_again:
 	mutex_lock(&sm->associnfo.mutex);