gallivm: Remove loop limiting

This is not conformant and it can cause hard to debug issues or hide
existing bugs. Getting rid of this limit will allow lavapipe to use the
common bvh building framework since the ploc build shader has a loop
that waits to start the next phase.

cc: mesa-stable

Acked-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31426>
5 files changed