iwm_txq_advance
iwm_txq_advance(sc, ring, ring->cur);
void iwm_txq_advance(struct iwm_softc *, struct iwm_tx_ring *, int);
iwm_txq_advance(sc, txq, IWM_AGG_SSN_TO_TXQ_IDX(ssn));
iwm_txq_advance(sc, ring, IWM_AGG_SSN_TO_TXQ_IDX(ssn));
iwm_txq_advance(sc, ring, IWM_AGG_SSN_TO_TXQ_IDX(ssn));