LTC device is now required for PGRAPH to work, add it.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
                device->oclass[NVDEV_SUBDEV_BUS    ] =  nvc0_bus_oclass;
                device->oclass[NVDEV_SUBDEV_TIMER  ] = &gk20a_timer_oclass;
                device->oclass[NVDEV_SUBDEV_FB     ] =  gk20a_fb_oclass;
+               device->oclass[NVDEV_SUBDEV_LTC    ] =  gk104_ltc_oclass;
                device->oclass[NVDEV_SUBDEV_IBUS   ] = &gk20a_ibus_oclass;
                device->oclass[NVDEV_SUBDEV_INSTMEM] = nv50_instmem_oclass;
                device->oclass[NVDEV_SUBDEV_VM     ] = &nvc0_vmmgr_oclass;