AR_PHY_TX_PWRCTRL7
OS_REG_RMW_FIELD(ah, AR_PHY_TX_PWRCTRL7, AR_PHY_TX_PWRCTRL_INIT_TX_GAIN, initTxGain);
txgain_max = MS(OS_REG_READ(ah, AR_PHY_TX_PWRCTRL7),