ath9k_hw: fix XPABIASLEVEL settings for AR9531

Signed-off-by: NRajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

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

@@ -3535,7 +3535,8 @@ static void ar9003_hw_xpa_bias_level_apply(struct ath_hw *ah, bool is2ghz)
 {
 	int bias = ar9003_modal_header(ah, is2ghz)->xpaBiasLvl;
 
-	if (AR_SREV_9485(ah) || AR_SREV_9330(ah) || AR_SREV_9340(ah))
+	if (AR_SREV_9485(ah) || AR_SREV_9330(ah) || AR_SREV_9340(ah) ||
+	    AR_SREV_9531(ah))
 		REG_RMW_FIELD(ah, AR_CH0_TOP2, AR_CH0_TOP2_XPABIASLVL, bias);
 	else if (AR_SREV_9462(ah) || AR_SREV_9550(ah) || AR_SREV_9565(ah))
 		REG_RMW_FIELD(ah, AR_CH0_TOP, AR_CH0_TOP_XPABIASLVL, bias);