ath9k_hw: use the skip count for PA calibration on AR9271

Periodic power amplifier offset calibration is skipped on ath9k
algorithmically, this is required on AR9271.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
index e76dd74..d5026e4 100644
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -1059,9 +1059,12 @@
 	/* Do NF cal only at longer intervals */
 	if (longcal) {
 		/* Do periodic PAOffset Cal */
-		if (AR_SREV_9271(ah))
-			ath9k_hw_9271_pa_cal(ah, false);
-		else if (AR_SREV_9285_11_OR_LATER(ah)) {
+		if (AR_SREV_9271(ah)) {
+			if (!ah->pacal_info.skipcount)
+				ath9k_hw_9271_pa_cal(ah, false);
+			else
+				ah->pacal_info.skipcount--;
+		} else if (AR_SREV_9285_11_OR_LATER(ah)) {
 			if (!ah->pacal_info.skipcount)
 				ath9k_hw_9285_pa_cal(ah, false);
 			else