armoury_set_devstate
err = armoury_set_devstate(attr, value, NULL, wmi_dev);
err = armoury_set_devstate(attr, optimus ? 1 : 0, NULL, asus_armoury.gpu_mux_dev_id);
err = armoury_set_devstate(attr, disable ? 1 : 0, NULL, ASUS_WMI_DEVID_DGPU);
err = armoury_set_devstate(attr, enable, &result, ASUS_WMI_DEVID_EGPU);
err = armoury_set_devstate(attr, mem, NULL, ASUS_WMI_DEVID_APU_MEM);