drm/nouveau/mc/gp104: initial support

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/engine/device/base.c

@@ -2184,6 +2184,7 @@ nv130_chipset = {
 static const struct nvkm_device_chip
 nv134_chipset = {
 	.name = "GP104",
+	.mc = gp100_mc_new,
 	.top = gk104_top_new,
 };