sdmmc_del_task
sdmmc_del_task(sc->sc_sf[1]->sc, &sc->sc_task, NULL);
if (!sdmmc_del_task(sc->sc_sf->sc, &task->task, &sc->sc_lock))
sdmmc_del_task(sc, &sc->sc_intr_task, NULL);
sdmmc_del_task(sc, &sc->sc_discover_task, NULL);
bool sdmmc_del_task(struct sdmmc_softc *, struct sdmmc_task *, kmutex_t *);