drm/tegra: Support bottom-up buffer objects

The gr3d engine renders images bottom-up. Allow buffers that are used
for 3D content to be marked as such and implement support in the display
controller to present them properly.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --cc drivers/gpu/drm/tegra/dc.c
Simple merge

diff --cc drivers/gpu/drm/tegra/dc.h
Simple merge

diff --cc drivers/gpu/drm/tegra/drm.h
Simple merge

diff --cc drivers/gpu/drm/tegra/fb.c
Simple merge

diff --cc drivers/gpu/drm/tegra/gem.c
Simple merge

diff --cc drivers/gpu/drm/tegra/gem.h
Simple merge

diff --cc include/uapi/drm/tegra_drm.h
Simple merge