mac80211: Fix duplicate frames on cooked monitor

Cleaning the ieee80211_rx_data.flags field here is wrong, instead the
flags should be valid accross processing the frame on different
interfaces. Fix this by removing the incorrect flags=0 assignment.

Introduced in commit 554891e
(mac80211: move packet flags into packet).

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/rx.c

@@ -2541,7 +2541,6 @@ static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx)
 		 * same TID from the same station
 		 */
 		rx->skb = skb;
-		rx->flags = 0;
 
 		CALL_RXH(ieee80211_rx_h_decrypt)
 		CALL_RXH(ieee80211_rx_h_check_more_data)
@@ -2612,6 +2611,7 @@ void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid)
 		.sdata = sta->sdata,
 		.local = sta->local,
 		.queue = tid,
+		.flags = 0,
 	};
 	struct tid_ampdu_rx *tid_agg_rx;