ISST_IF_DEV_MMIO
info.mmio_supported = punit_callbacks[ISST_IF_DEV_MMIO].registered;
cb = &punit_callbacks[ISST_IF_DEV_MMIO];
ret = isst_if_cdev_register(ISST_IF_DEV_MMIO, &cb);
isst_if_cdev_unregister(ISST_IF_DEV_MMIO);