ath_tx_setup
static int ath_tx_setup(struct ath_softc *, int, int);
if (!ath_tx_setup(sc, WME_AC_BK, HAL_WME_AC_BK)) {
if (!ath_tx_setup(sc, WME_AC_BE, HAL_WME_AC_BE) ||
!ath_tx_setup(sc, WME_AC_VI, HAL_WME_AC_VI) ||
!ath_tx_setup(sc, WME_AC_VO, HAL_WME_AC_VO)) {