mac80211: remove an unnecessary paraenthesis

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 3789b82..e895ad5 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -819,7 +819,7 @@
 	}
 
 	if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
-	    (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) {
+	    !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
 		netif_tx_stop_all_queues(sdata->dev);
 
 		if (drv_tx_frames_pending(local))