virtio_gpu: Add HW_VIDEO_ENCODER usage flags to NV12

A virtual device resolves a flexible format to NV12. NV12 should
have the usage HW_VIDEO_ENCODER.

BUG=b:145715379
TEST=Camera video recording on a virtual device

Change-Id: I8ea1c75087d35c19c472890138c603b74f1ef491
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/1955344
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Matthias Springer <springerm@chromium.org>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Tested-by: Matthias Springer <springerm@chromium.org>
Auto-Submit: Hirokazu Honda <hiroh@chromium.org>
Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
1 file changed