ath9k: fix handling configured tx power limits

SVN-Revision: 28260

package/mac80211/patches/581-ath9k_cleanup_txpower_handling.patch

@@ -175,7 +175,7 @@
 -	int reg_pwr = min_t(int, MAX_RATE_POWER, limit);
 -	int chan_pwr = channel->max_power * 2;
  
-+	reg->power_limit = min_t(int, limit, MAX_RATE_POWER);
++	reg->power_limit = min_t(int, limit * 2, MAX_RATE_POWER);
  	if (test)
 -		reg_pwr = chan_pwr = MAX_RATE_POWER;
 +		channel->max_power = MAX_RATE_POWER / 2;