ath9k: optimize power level initialization for CTL_[25]GHT20

The first part of the power array is initialized in a loop
and the last two values are initialized separately. Extend
the loop to cover the last two items, and remove the separate
initialization.
Signed-off-by: NGabor Juhos <juhosg@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ar9003_eeprom.c

@@ -4963,16 +4963,10 @@ static void ar9003_hw_set_power_per_rate_table(struct ath_hw *ah,
 			case CTL_5GHT20:
 			case CTL_2GHT20:
 				for (i = ALL_TARGET_HT20_0_8_16;
-				     i <= ALL_TARGET_HT20_21; i++)
+				     i <= ALL_TARGET_HT20_23; i++)
 					pPwrArray[i] =
 					  (u8)min((u16)pPwrArray[i],
 						  minCtlPower);
-				pPwrArray[ALL_TARGET_HT20_22] =
-				  (u8)min((u16)pPwrArray[ALL_TARGET_HT20_22],
-					  minCtlPower);
-				pPwrArray[ALL_TARGET_HT20_23] =
-				  (u8)min((u16)pPwrArray[ALL_TARGET_HT20_23],
-					   minCtlPower);
 				break;
 			case CTL_5GHT40:
 			case CTL_2GHT40: