FROMLIST: drm/prime: add support for virtio exported objects

This change exposes dma-buf's get_uuid callback to PRIME drivers.

Signed-off-by: David Stevens <stevensd@chromium.org>

BUG=b:136269340
TEST=boot ARCVM and launch play store

Signed-off-by: Keiichi Watanabe <keiichiw@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2090951


Reviewed-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: David Stevens <stevensd@chromium.org>
Commit-Queue: David Stevens <stevensd@chromium.org>
Bug: 153580313
Link: https://lore.kernel.org/lkml/20200311112004.47138-3-stevensd@chromium.org/


Change-Id: I0599ce4cafee3dc705805c1ad97295bea264cfdf
Signed-off-by: Lingfeng Yang <lfy@google.com>