rum_read_multi
rum_read_multi(sc, reg, &val, sizeof val);
static void rum_read_multi(struct rum_softc *, uint16_t, void *,
rum_read_multi(sc, RT2573_TXRX_CSR12, buf, sizeof (*buf));
rum_read_multi(sc, RT2573_STA_CSR0, sc->sta, sizeof sc->sta);
rum_read_multi(sc, RT2573_STA_CSR0, sc->sta, sizeof sc->sta);
rum_read_multi(sc, RT2573_STA_CSR0, sc->sta, sizeof(sc->sta));