ath9k: don't run periodic and nf calibation at the same time

The checks already prevents periodic cal from being started while noise
floor calibration runs. It is missing checks for the other way around.
Signed-off-by: NFelix Fietkau <nbd@nbd.name>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath9k/ar9002_calib.c

@@ -676,10 +676,10 @@ static int ar9002_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
 			return 0;
 
 		ah->cal_list_curr = currCal = currCal->calNext;
-		if (currCal->calState == CAL_WAITING) {
+		if (currCal->calState == CAL_WAITING)
 			ath9k_hw_reset_calibration(ah, currCal);
-			return 0;
-		}
+
+		return 0;
 	}
 
 	/* Do NF cal only at longer intervals */