ath9k: Fix bugs in programming registers during PA CAL

* First PA driver (PDPADRV1) was not powered down properly.
* Compensation capacitor for dynamic PA was programmed incorrectly.

Also, remove a stray REG_READ.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

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

@@ -901,13 +901,13 @@ static inline void ath9k_hw_9285_pa_cal(struct ath_hw *ah, bool is_reset)
 	REG_RMW_FIELD(ah, AR9285_AN_RF2G2, AR9285_AN_RF2G2_OFFCAL, 0);
 	REG_RMW_FIELD(ah, AR9285_AN_RF2G7, AR9285_AN_RF2G7_PWDDB, 0);
 	REG_RMW_FIELD(ah, AR9285_AN_RF2G1, AR9285_AN_RF2G1_ENPACAL, 0);
-	REG_RMW_FIELD(ah, AR9285_AN_RF2G1, AR9285_AN_RF2G1_PDPADRV1, 1);
+	REG_RMW_FIELD(ah, AR9285_AN_RF2G1, AR9285_AN_RF2G1_PDPADRV1, 0);
 	REG_RMW_FIELD(ah, AR9285_AN_RF2G1, AR9285_AN_RF2G1_PDPADRV2, 0);
 	REG_RMW_FIELD(ah, AR9285_AN_RF2G1, AR9285_AN_RF2G1_PDPAOUT, 0);
 	REG_RMW_FIELD(ah, AR9285_AN_RF2G8, AR9285_AN_RF2G8_PADRVGN2TAB0, 7);
 	REG_RMW_FIELD(ah, AR9285_AN_RF2G7, AR9285_AN_RF2G7_PADRVGN2TAB0, 0);
 	ccomp_org = MS(REG_READ(ah, AR9285_AN_RF2G6), AR9285_AN_RF2G6_CCOMP);
-	REG_RMW_FIELD(ah, AR9285_AN_RF2G6, AR9285_AN_RF2G6_CCOMP, 7);
+	REG_RMW_FIELD(ah, AR9285_AN_RF2G6, AR9285_AN_RF2G6_CCOMP, 0xf);
 
 	REG_WRITE(ah, AR9285_AN_TOP2, 0xca0358a0);
 	udelay(30);
@@ -919,7 +919,6 @@ static inline void ath9k_hw_9285_pa_cal(struct ath_hw *ah, bool is_reset)
 		regVal |= (1 << (19 + i));
 		REG_WRITE(ah, 0x7834, regVal);
 		udelay(1);
-		regVal = REG_READ(ah, 0x7834);
 		regVal &= (~(0x1 << (19 + i)));
 		reg_field = MS(REG_READ(ah, 0x7840), AR9285_AN_RXTXBB1_SPARE9);
 		regVal |= (reg_field << (19 + i));