drm/nv50/disp: inform core when we're not creating a new context

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

drivers/gpu/drm/nouveau/core/engine/disp/nv50.c

@@ -719,7 +719,7 @@ nv50_disp_data_ctor(struct nouveau_object *parent,
 	if (nv_mclass(parent) != NV_DEVICE_CLASS) {
 		atomic_inc(&parent->refcount);
 		*pobject = parent;
-		return 0;
+		return 1;
 	}
 
 	/* allocate display hardware to client */