mac80211: don't duplicate station QoS capability data

We currently track the QoS capability twice: for all peer stations
in the WLAN_STA_WME flag, and for any clients associated to an AP
interface separately for drivers in the sta->sta.wme field.

Remove the WLAN_STA_WME flag and track the capability only in the
driver-visible field, getting rid of the limitation that the field
is only valid in AP mode.

Reviewed-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 63b8741..8d67c1e 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -431,14 +431,12 @@
 		return NULL;
 
 	sta->plink_state = NL80211_PLINK_LISTEN;
+	sta->sta.wme = true;
 
 	sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
 	sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
 	sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
 
-	set_sta_flag(sta, WLAN_STA_WME);
-	sta->sta.wme = true;
-
 	return sta;
 }