pan/bi: Handle fp16/abs scheduling restriction

See previous commit for the packing side. Here we update the scheduler
to accomodate this. Note we don't actually hit this path yet, but it's
good to be proactive.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4382>
3 files changed