HAL_CAP_RX_CHAINMASK
case HAL_CAP_RX_CHAINMASK: /* mask of RX chains supported */
case HAL_CAP_RX_CHAINMASK:
(ath_hal_getcapability(_ah, HAL_CAP_RX_CHAINMASK, 0, _prxchainmask))
(ath_hal_setcapability(_ah, HAL_CAP_RX_CHAINMASK, 1, _rx, NULL))