mac80211: fix IBSS probe response storms on drivers that do not support drv_tx_last_beacon()

SVN-Revision: 24497

package/mac80211/patches/330-ibss_supress_proberesp.patch

@@ -0,0 +1,11 @@
+--- a/net/mac80211/driver-ops.h
++++ b/net/mac80211/driver-ops.h
+@@ -381,7 +381,7 @@ static inline void drv_reset_tsf(struct 
+ 
+ static inline int drv_tx_last_beacon(struct ieee80211_local *local)
+ {
+-	int ret = 1;
++	int ret = 0; /* default unsuported op for less congestion */
+ 
+ 	might_sleep();
+