ath9k: Cleanup TX power calculation for 4K chips

Write CCK power-per-rate array always and report
correct TX power to regulatory.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/eeprom_4k.c

@@ -737,11 +737,23 @@ static void ath9k_hw_4k_set_txpower(struct ath_hw *ah,
 			ratesArray[i] = AR5416_MAX_RATE_POWER;
 	}
 
+
+	/* Update regulatory */
+
+	i = rate6mb;
+	if (IS_CHAN_HT40(chan))
+		i = rateHt40_0;
+	else if (IS_CHAN_HT20(chan))
+		i = rateHt20_0;
+
+	ah->regulatory.max_power_level = ratesArray[i];
+
 	if (AR_SREV_9280_10_OR_LATER(ah)) {
 		for (i = 0; i < Ar5416RateSize; i++)
 			ratesArray[i] -= AR5416_PWR_TABLE_OFFSET * 2;
 	}
 
+	/* OFDM power per rate */
 	REG_WRITE(ah, AR_PHY_POWER_TX_RATE1,
 		  ATH9K_POW_SM(ratesArray[rate18mb], 24)
 		  | ATH9K_POW_SM(ratesArray[rate12mb], 16)
@@ -753,7 +765,7 @@ static void ath9k_hw_4k_set_txpower(struct ath_hw *ah,
 		  | ATH9K_POW_SM(ratesArray[rate36mb], 8)
 		  | ATH9K_POW_SM(ratesArray[rate24mb], 0));
 
-	if (IS_CHAN_2GHZ(chan)) {
+	/* CCK power per rate */
 	REG_WRITE(ah, AR_PHY_POWER_TX_RATE3,
 		  ATH9K_POW_SM(ratesArray[rate2s], 24)
 		  | ATH9K_POW_SM(ratesArray[rate2l], 16)
@@ -764,8 +776,8 @@ static void ath9k_hw_4k_set_txpower(struct ath_hw *ah,
 		  | ATH9K_POW_SM(ratesArray[rate11l], 16)
 		  | ATH9K_POW_SM(ratesArray[rate5_5s], 8)
 		  | ATH9K_POW_SM(ratesArray[rate5_5l], 0));
-	}
 
+	/* HT20 power per rate */
 	REG_WRITE(ah, AR_PHY_POWER_TX_RATE5,
 		  ATH9K_POW_SM(ratesArray[rateHt20_3], 24)
 		  | ATH9K_POW_SM(ratesArray[rateHt20_2], 16)
@@ -777,6 +789,7 @@ static void ath9k_hw_4k_set_txpower(struct ath_hw *ah,
 		  | ATH9K_POW_SM(ratesArray[rateHt20_5], 8)
 		  | ATH9K_POW_SM(ratesArray[rateHt20_4], 0));
 
+	/* HT40 power per rate */
 	if (IS_CHAN_HT40(chan)) {
 		REG_WRITE(ah, AR_PHY_POWER_TX_RATE7,
 			  ATH9K_POW_SM(ratesArray[rateHt40_3] +
@@ -796,27 +809,12 @@ static void ath9k_hw_4k_set_txpower(struct ath_hw *ah,
 					 ht40PowerIncForPdadc, 8)
 			  | ATH9K_POW_SM(ratesArray[rateHt40_4] +
 					 ht40PowerIncForPdadc, 0));
-
 		REG_WRITE(ah, AR_PHY_POWER_TX_RATE9,
 			  ATH9K_POW_SM(ratesArray[rateExtOfdm], 24)
 			  | ATH9K_POW_SM(ratesArray[rateExtCck], 16)
 			  | ATH9K_POW_SM(ratesArray[rateDupOfdm], 8)
 			  | ATH9K_POW_SM(ratesArray[rateDupCck], 0));
 	}
-
-	i = rate6mb;
-
-	if (IS_CHAN_HT40(chan))
-		i = rateHt40_0;
-	else if (IS_CHAN_HT20(chan))
-		i = rateHt20_0;
-
-	if (AR_SREV_9280_10_OR_LATER(ah))
-		ah->regulatory.max_power_level =
-			ratesArray[i] + AR5416_PWR_TABLE_OFFSET * 2;
-	else
-		ah->regulatory.max_power_level = ratesArray[i];
-
 }
 
 static void ath9k_hw_4k_set_addac(struct ath_hw *ah,