ath9k_hw: do not limit initial tx power to 20 dbm

When testing for tx power, bypass the default limits.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/hw.c

@@ -2439,15 +2439,18 @@ void ath9k_hw_set_txpowerlimit(struct ath_hw *ah, u32 limit, bool test)
 	struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
 	struct ath9k_channel *chan = ah->curchan;
 	struct ieee80211_channel *channel = chan->chan;
+	int reg_pwr = min_t(int, MAX_RATE_POWER, regulatory->power_limit);
+	int chan_pwr = channel->max_power * 2;
+
+	if (test)
+		reg_pwr = chan_pwr = MAX_RATE_POWER;
 
 	regulatory->power_limit = min(limit, (u32) MAX_RATE_POWER);
 
 	ah->eep_ops->set_txpower(ah, chan,
 				 ath9k_regd_get_ctl(regulatory, chan),
 				 channel->max_antenna_gain * 2,
-				 channel->max_power * 2,
-				 min((u32) MAX_RATE_POWER,
-				 (u32) regulatory->power_limit), test);
+				 chan_pwr, reg_pwr, test);
 }
 EXPORT_SYMBOL(ath9k_hw_set_txpowerlimit);