refcounting uses atomics, which are a significant source of CPU overhead
in many applications. by adding a method to inform the driver that
the frontend has released ownership of a buffer, all other refcounting
for the buffer can be eliminated
see MR for more details
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36296>
Mike Blumenkrantz
b3133e250e