AR_PHY_RX_CHAINMASK  304 drivers/net/wireless/ath/ath9k/ar9002_phy.h #define AR_PHY_RX_CHAINMASK     0x99a4
AR_PHY_RX_CHAINMASK  475 drivers/net/wireless/ath/ath9k/ar9003_phy.h #define AR_PHY_RX_CHAINMASK      (AR_SM_BASE + 0xa0)