mmc_fdt_parse
mmc_fdt_parse(dev, 0, &sc->mmc_helper, &sc->aw_host);
mmc_fdt_parse(dev, 0, &sc->sc_mmc_helper, &sc->sc_slot.host);
mmc_fdt_parse(sc->dev, node, &sc->mmc_helper, &sc->host);
int mmc_fdt_parse(device_t dev, phandle_t node, struct mmc_helper *helper, struct mmc_host *host);
mmc_fdt_parse(dev, node, &sc->fdt_helper, &sc->slot.host);
mmc_fdt_parse(dev, 0, &mmc_helper, &slot->host);