UPSTREAM: drm/virtio: make resource id workaround runtime switchable.

commit 3e93bc2a58aa241081e043ef9e6e86c42808499a upstream.

Also update the comment with a reference to the virglrenderer fix.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190822102614.18164-1-kraxel@redhat.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit d41f6cfd9aa7c3f01b44fc1ee15bac5589fd1b60)
Bug: 153580313
Signed-off-by: Alistair Delva <adelva@google.com>
Change-Id: If17d7c7303b9c4e9e03566a20386d46c3bf188b1