mac80211: use IEEE80211_NUM_ACS

When comparing hw->queues to determine if the
device is QoS capable, use IEEE80211_NUM_ACS
instead of just 4.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 547cd7e..e910449 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -167,7 +167,7 @@
 						 chan, channel_type);
 	}
 
-	if (local->hw.queues >= 4) {
+	if (local->hw.queues >= IEEE80211_NUM_ACS) {
 		pos = skb_put(skb, 9);
 		*pos++ = WLAN_EID_VENDOR_SPECIFIC;
 		*pos++ = 7; /* len */