mwl_tx_processq
nreaped += mwl_tx_processq(sc, &sc->sc_txq[0]);
nreaped += mwl_tx_processq(sc, &sc->sc_txq[1]);
nreaped += mwl_tx_processq(sc, &sc->sc_txq[2]);
nreaped += mwl_tx_processq(sc, &sc->sc_txq[3]);