minigbm: mediatek: remove USE_SCANOUT in yuv format

minigbm clients use the SCANOUT flag whenever they want the
minigbm-allocated buffers to be promoted to overlays. Mediatek doesn't
support YUV overlays, so remove the SCANOUT flag.

BUG=b:224698291
TEST=emerge on elm, emerge and deploy on kukui/jacuzzi

Change-Id: If3ee2fb925c7e729269c31caab991bb0bc56b0de
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/3555233
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Feels: Hsin-Yi Wang <hsinyi@chromium.org>
Auto-Submit: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Miguel Casas <mcasas@google.com>
Commit-Queue: Hsin-Yi Wang <hsinyi@chromium.org>
1 file changed