minigbm/msm: disable UBWC for virtualization

This actually reverts commit 407eb0ebf3ce52fd4b3d79712d1b86d7b021c29b.
However, the rationales have been updated.

BUG=b:229147702
TEST=emerge and deploy and verified graphics working in crostini

Change-Id: I8f491daf14f97a5dbda797207886695a985e44e7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/3586372
Tested-by: Yiwei Zhang <zzyiwei@chromium.org>
Auto-Submit: Yiwei Zhang <zzyiwei@chromium.org>
Commit-Queue: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Chia-I Wu <olv@google.com>
Commit-Queue: Chia-I Wu <olv@google.com>
1 file changed