minigbm: resolve front rendering usage for gralloc3+

TEST=no regression in ARCVM low latency stylus demo

Change-Id: I8b7983664779d05fc1463edc1ef813de2bcc6540
Reported-by: Roman Stratiienko <r.stratiienko@gmail.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/3012235
Tested-by: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Jason Macnak <natsu@google.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Roman Stratiienko <r.stratiienko@gmail.com>
Commit-Queue: Yiwei Zhang <zzyiwei@chromium.org>
4 files changed