ath9k: disable interrupt mitigation - it hurts performance on embedded systems

SVN-Revision: 18626

package/mac80211/patches/560-disable_interrupt_mitigation.patch

+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -395,7 +395,7 @@ static void ath9k_hw_init_config(struct 
+ 		ah->config.spurchans[i][1] = AR_NO_SPUR;
+ 	}
+ 
+-	ah->config.intr_mitigation = true;
++	ah->config.intr_mitigation = false;
+ 
+ 	/*
+ 	 * We need this for PCI devices only (Cardbus, PCI, miniPCI)