drm/todo: Improve drm_gem_object funcs todo

We're kinda going in the wrong direction. Spotted while typing better
gem/prime docs.

Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: NEric Anholt <eric@anholt.net>
Acked-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190614203615.12639-2-daniel.vetter@ffwll.ch

Documentation/gpu/todo.rst

@@ -228,6 +228,10 @@ struct drm_gem_object_funcs
 GEM objects can now have a function table instead of having the callbacks on the
 DRM driver struct. This is now the preferred way and drivers can be moved over.
 
+Unfortunately some of the recently added GEM helpers are going in the wrong
+direction by adding OPS macros that use the old, deprecated hooks. See
+DRM_GEM_CMA_VMAP_DRIVER_OPS, DRM_GEM_SHMEM_DRIVER_OPS, and DRM_GEM_VRAM_DRIVER_PRIME.
+
 Use DRM_MODESET_LOCK_ALL_* helpers instead of boilerplate
 ---------------------------------------------------------