HAL_CAP_TPC
(ath_hal_getcapability(_ah, HAL_CAP_TPC, 0, NULL) == HAL_OK)
(ath_hal_getcapability(_ah, HAL_CAP_TPC, 1, NULL) == HAL_OK)
ath_hal_setcapability(_ah, HAL_CAP_TPC, 1, _v, NULL)
case HAL_CAP_TPC:
case HAL_CAP_TPC: