minigbm: mediatek: Do not scan out ABGR8888/XBGR8888
Adding ABGR8888 breaks the software cursor on ARC++,
XBGR8888 is not supported by the DRM driver.
BUG=b:
32554065
BUG=chrome-os-partner:59436
TEST=Open play store on elm, cursor appears fine.
Change-Id: I7366d2b2acfc50415c381131ba7cf8b70c0de5d8
Reviewed-on: https://chromium-review.googlesource.com/408536
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>