GitLab

This CL replaces the DRM specific XB30 with AB30 where
appropriate, and adds the necessary entries to support
AB30 with SCANOUT usage.

Test: forcing RGBA_1010102 as DisplaySnapshot::PrimaryFormat,
and allowing for only an opaque FB (ToT wants both opaque and
normal) the primary plane of the device is indeed XB30 as per
/sys/kernel/debug/dri/0/state).
and
 gl_unittests  --gtest_also_run_disabled_tests
and
 ozone_gl_unittests  --gtest_also_run_disabled_tests
AB30 test cases passing.

Bug: 949260
Change-Id: Ie1841763b059971460597eded768a9a9827914b8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1960073Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Michael Spang <spang@chromium.org>
Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Commit-Queue: Miguel Casas <mcasas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#732211}