rum_setup_tx_desc
rum_setup_tx_desc(sc, desc,
rum_setup_tx_desc(sc, desc, flags, 0, m0->m_pkthdr.len, rate);
void rum_setup_tx_desc(struct rum_softc *, struct rum_tx_desc *,
rum_setup_tx_desc(sc, &desc, RT2573_TX_TIMESTAMP, RT2573_TX_HWSEQ,