scmi_request
int scmi_request(device_t dev, void *in, void **);
error = scmi_request(sc->scmi, in, &out);
error = scmi_request(sc->scmi, in, (void **)&out);
error = scmi_request(sc->scmi, in, (void **)&out);
error = scmi_request(sc->scmi, in, (void **)&out);
error = scmi_request(sc->scmi, in, (void **)&out);
error = scmi_request(sc->scmi, in, &out);