ac/nir: abort when an unknown intrinsic is reached

This would have catched this NIR GS lowering regression earlier.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7127>
1 file changed