mmc_send_status
err = mmc_send_status(sc->dev, sc->dev, ivar->rca,
err = mmc_send_status(sc->dev, sc->dev, ivar->rca, &status);
err = mmc_send_status(busdev, dev, rca, &status);
int mmc_send_status(device_t busdev, device_t dev, uint16_t rca,
err = mmc_send_status(mmcbus, dev, rca, &status);