nv50_bus_new
int nv50_bus_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_bus **);
.bus = { 0x00000001, nv50_bus_new },
.bus = { 0x00000001, nv50_bus_new },
.bus = { 0x00000001, nv50_bus_new },
.bus = { 0x00000001, nv50_bus_new },