minigbm: virtio_gpu: add BO_USE_HW_VIDEO_DECODER usage to R8 format.

This combination will be used by ARCVM for video decoder bitstream
blobs.

BUG=b:156442659
TEST=run e2e test with C2VDAComponent

Change-Id: Iad978f659c0a8edf3279b303794c2b840446be31
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/2189994
Reviewed-by: Keiichi Watanabe <keiichiw@chromium.org>
Reviewed-by: David Stevens <stevensd@chromium.org>
Auto-Submit: Chih-Yu Huang <akahuang@chromium.org>
Commit-Queue: Chih-Yu Huang <akahuang@chromium.org>
Tested-by: Chih-Yu Huang <akahuang@chromium.org>
diff --git a/virtio_gpu.c b/virtio_gpu.c
index 4912af0..4dbcc4f 100644
--- a/virtio_gpu.c
+++ b/virtio_gpu.c
@@ -345,7 +345,7 @@
 			       BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE | BO_USE_HW_VIDEO_DECODER |
 				   BO_USE_HW_VIDEO_ENCODER);
 	drv_modify_combination(drv, DRM_FORMAT_R8, &LINEAR_METADATA,
-			       BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE);
+			       BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE | BO_USE_HW_VIDEO_DECODER);
 
 	return drv_modify_linear_combinations(drv);
 }