ath5k: fix txop calculation similar to what was done in ath9k

SVN-Revision: 32735

package/mac80211/patches/421-ath5k_fix_txop.patch

@@ -0,0 +1,11 @@
+--- a/drivers/net/wireless/ath/ath5k/mac80211-ops.c
++++ b/drivers/net/wireless/ath/ath5k/mac80211-ops.c
+@@ -617,7 +617,7 @@ ath5k_conf_tx(struct ieee80211_hw *hw, s
+ 	qi.tqi_aifs = params->aifs;
+ 	qi.tqi_cw_min = params->cw_min;
+ 	qi.tqi_cw_max = params->cw_max;
+-	qi.tqi_burst_time = params->txop;
++	qi.tqi_burst_time = params->txop * 32;
+ 
+ 	ATH5K_DBG(ah, ATH5K_DEBUG_ANY,
+ 		  "Configure tx [queue %d],  "