ath9k_hw: Update normal/min noise floor value for AR9480

To improve sensitivity for AR9480, the normal and minimum
noise floor values of both bands are updated.
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ar9003_phy.h

@@ -325,10 +325,10 @@
 
 #define AR_PHY_RX_OCGAIN        (AR_AGC_BASE + 0x200)
 
-#define AR_PHY_CCA_NOM_VAL_9300_2GHZ          -110
-#define AR_PHY_CCA_NOM_VAL_9300_5GHZ          -115
-#define AR_PHY_CCA_MIN_GOOD_VAL_9300_2GHZ     -125
-#define AR_PHY_CCA_MIN_GOOD_VAL_9300_5GHZ     -125
+#define AR_PHY_CCA_NOM_VAL_9300_2GHZ          (AR_SREV_9480(ah) ? -127 : -110)
+#define AR_PHY_CCA_NOM_VAL_9300_5GHZ          (AR_SREV_9480(ah) ? -127 : -115)
+#define AR_PHY_CCA_MIN_GOOD_VAL_9300_2GHZ     (AR_SREV_9480(ah) ? -127 : -125)
+#define AR_PHY_CCA_MIN_GOOD_VAL_9300_5GHZ     (AR_SREV_9480(ah) ? -127 : -125)
 #define AR_PHY_CCA_MAX_GOOD_VAL_9300_2GHZ     -95
 #define AR_PHY_CCA_MAX_GOOD_VAL_9300_5GHZ     -100