RTW_TXPRIHI
sc->sc_txdesc_blk[RTW_TXPRIHI].tdb_basereg = RTW_THPDA;
sc->sc_txdesc_blk[RTW_TXPRIHI].tdb_base = RTW_RING_BASE(sc, hd_txhi);
if ((*mp = rtw_80211_dequeue(sc, &ic->ic_pwrsaveq, RTW_TXPRIHI,
tsbs[RTW_TXPRIHI].tsb_poll = RTW_TPPOLL_HPQ | RTW_TPPOLL_SHPQ;
rtw_txdesc_blk_setup(&sc->sc_txdesc_blk[RTW_TXPRIHI],