CHROMIUM: drm/rockchip: Add rotation:reflect-y property.

This CL adds the KMS property "rotation" to the drm rockchip module.
It only adds support for the value of "reflect-y" that is needed in
order to use overlays for Pepper and Canvas content.

The "reflect-y" value is not compatible with YUV and compressed formats.

BUG=b:36752417
TEST=WebGL and Pepper on a custom Chrome. Checked HW overlays were used.

Change-Id: I23f5f830c8a94376cdc0893634097139d6fd9252
Reviewed-on: https://chromium-review.googlesource.com/468191
Commit-Ready: David Reveman <reveman@chromium.org>
Tested-by: David Reveman <reveman@chromium.org>
Reviewed-by: David Reveman <reveman@chromium.org>
4 files changed