ttn: Add new allow_disk_cache parameter

For now this parameter doesn't do anything.
It means the implementation is allowed to use
a cache on disk.

Signed-off-by: Axel Davy <davyaxel0@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4993>
14 files changed