ath9k_hw: Find chansel of AR_PHY_65NM_CH0_SYNTH7 for AR9485

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/phy.h b/drivers/net/wireless/ath/ath9k/phy.h
index 17969af..5e3d749 100644
--- a/drivers/net/wireless/ath/ath9k/phy.h
+++ b/drivers/net/wireless/ath/ath9k/phy.h
@@ -19,6 +19,7 @@
 
 #define CHANSEL_DIV		15
 #define CHANSEL_2G(_freq)	(((_freq) * 0x10000) / CHANSEL_DIV)
+#define CHANSEL_2G_9485(_freq)	((((_freq) * 0x10000) - 215) / CHANSEL_DIV)
 #define CHANSEL_5G(_freq)	(((_freq) * 0x8000) / CHANSEL_DIV)
 
 #define AR_PHY_BASE     0x9800