Revert "mac80211: temporarily disable reorder release timer"

This reverts enables the reorder release timer once again.

The issues laid out in:
<http://www.spinics.net/lists/linux-wireless/msg57214.html>

Have been addressed by:
	mac80211: serialize rx path workers
	mac80211: ignore PSM bit of reordered frames
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/rx.c

@@ -628,26 +628,6 @@ static void ieee80211_sta_reorder_release(struct ieee80211_hw *hw,
 							tid_agg_rx->buf_size;
 	}
 
-	/*
-	 * Disable the reorder release timer for now.
-	 *
-	 * The current implementation lacks a proper locking scheme
-	 * which would protect vital statistic and debug counters
-	 * from being updated by two different but concurrent BHs.
-	 *
-	 * More information about the topic is available from:
-	 * - thread: http://marc.info/?t=128635927000001
-	 *
-	 * What was wrong:
-	 * =>  http://marc.info/?l=linux-wireless&m=128636170811964
-	 * "Basically the thing is that until your patch, the data
-	 *  in the struct didn't actually need locking because it
-	 *  was accessed by the RX path only which is not concurrent."
-	 *
-	 * List of what needs to be fixed:
-	 * => http://marc.info/?l=linux-wireless&m=128656352920957
-	 *
-
 	if (tid_agg_rx->stored_mpdu_num) {
 		j = index = seq_sub(tid_agg_rx->head_seq_num,
 				    tid_agg_rx->ssn) % tid_agg_rx->buf_size;
@@ -666,10 +646,6 @@ static void ieee80211_sta_reorder_release(struct ieee80211_hw *hw,
 	} else {
 		del_timer(&tid_agg_rx->reorder_timer);
 	}
-	*/
-
-set_release_timer:
-	return;
 }
 
 /*