ath9k_hw: clear the AM2PM predistortion mask on AR933x

That predistortion type is not supported
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ar9003_paprd.c

@@ -142,6 +142,7 @@ static int ar9003_paprd_setup_single_table(struct ath_hw *ah)
 	};
 	int training_power;
 	int i, val;
+	u32 am2pm_mask = ah->paprd_ratemask;
 
 	if (IS_CHAN_2GHZ(ah->curchan))
 		training_power = ar9003_get_training_power_2g(ah);
@@ -158,10 +159,13 @@ static int ar9003_paprd_setup_single_table(struct ath_hw *ah)
 	}
 	ah->paprd_training_power = training_power;
 
+	if (AR_SREV_9330(ah))
+		am2pm_mask = 0;
+
 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK,
 		      ah->paprd_ratemask);
 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK,
-		      ah->paprd_ratemask);
+		      am2pm_mask);
 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_HT40, AR_PHY_PAPRD_HT40_MASK,
 		      ah->paprd_ratemask_ht40);