mac80211: trivial: use WLAN_BACK_RECIPIENT instead of hardcoded 0

  Use WLAN_BACK_RECIPIENT instead of hardcoded 0 for clarity
Signed-off-by: NNikolay Martynov <mar.kolya@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

net/mac80211/agg-rx.c

@@ -85,7 +85,7 @@ void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
 	/* check if this is a self generated aggregation halt */
 	if (initiator == WLAN_BACK_RECIPIENT && tx)
 		ieee80211_send_delba(sta->sdata, sta->sta.addr,
-				     tid, 0, reason);
+				     tid, WLAN_BACK_RECIPIENT, reason);
 
 	del_timer_sync(&tid_rx->session_timer);
 	del_timer_sync(&tid_rx->reorder_timer);