drm/nouveau: use embedded gem object

Drop drm_gem_object from nouveau_bo, use the
ttm_buffer_object.base instead.

Build tested only.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Christian König <christian.koenig@amd.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190805140119.7337-7-kraxel@redhat.com

drivers/gpu/drm/nouveau/nouveau_gem.h

@@ -10,7 +10,7 @@
 static inline struct nouveau_bo *
 nouveau_gem_object(struct drm_gem_object *gem)
 {
-	return gem ? container_of(gem, struct nouveau_bo, gem) : NULL;
+	return gem ? container_of(gem, struct nouveau_bo, bo.base) : NULL;
 }
 
 /* nouveau_gem.c */