mmc_cam_sim_alloc
if (mmc_cam_sim_alloc(dev, "aw_mmc", &sc->mmc_sim) != 0) {
int mmc_cam_sim_alloc(device_t dev, const char *name, struct mmc_sim *mmc_sim);
if (mmc_cam_sim_alloc(dev, "dw_mmc", &sc->mmc_sim) != 0) {
if (mmc_cam_sim_alloc(dev, "rtsx_mmc", &sc->rtsx_mmc_sim) != 0) {