mac80211: use eth_broadcast_addr

Instead of memset().

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 5583f5b..df64b45 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -950,7 +950,7 @@
 	/* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 	 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 
-	memset(msg->da, 0xff, ETH_ALEN);
+	eth_broadcast_addr(msg->da);
 	memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 	msg->len = htons(6);
 	msg->dsap = 0;