turnip: use the common code for generating extensions and dispatch tables

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4987>
2 files changed