vtn/opencl: Switch some nir-sequence ops to use libclc

All of these are pretty well-defined. Rather than implementing them
as a sequence of nir ops, we can just use the libclc implementation.

v2 (idr): Delete functions that are now unused.

Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6035>
3 files changed