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 554891e63a29af35cc6bb403ef34e319518114d0
(mac80211: move packet flags into packet).

Signed-off-by: Helmut Schaa <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

net/mac80211/rx.c

···
 		 * 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)
···
 		.sdata = sta->sdata,
 		.local = sta->local,
 		.queue = tid,
+		.flags = 0,
 	};
 	struct tid_ampdu_rx *tid_agg_rx;