ath9k_hw: Read and configure turnning caps to regulate freq accuracy

Right now it is done for only AR9485, will be done for ar9003 also
after proper testing.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.h b/drivers/net/wireless/ath/ath9k/ar9003_phy.h
index 8de3ffd..4c64eb1 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.h
@@ -598,6 +598,12 @@
 #define AR_CH0_TOP2_XPABIASLVL		0xf000
 #define AR_CH0_TOP2_XPABIASLVL_S	12
 
+#define AR_CH0_XTAL		(AR_SREV_9485(ah) ? 0x16290 : 0x16294)
+#define AR_CH0_XTAL_CAPINDAC	0x7f000000
+#define AR_CH0_XTAL_CAPINDAC_S	24
+#define AR_CH0_XTAL_CAPOUTDAC	0x00fe0000
+#define AR_CH0_XTAL_CAPOUTDAC_S	17
+
 #define AR_PHY_PMU1		0x16c40
 #define AR_PHY_PMU1_PWD		0x1
 #define AR_PHY_PMU1_PWD_S	0