pan/mdg: prevent csel_v from being scheduled alongside writeout

pan/mdg: prevent csel_v from being scheduled alongside writeout

Midgard writeout arguments need to be written to in the same bundle the
writeout happens.  Both csel, csel_v and their float variants also
require their conditional to be performed on the same bundle.

This patch prevents scheduling csel the same bundle as a writeout,
fixing the scheduling issue.

But... there's still room for optimizations since in some cases it might
be possible to fit all these instructions in the same bundle.

No shader-db changes.

Signed-off-by: Italo Nicola <italonicola@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9340>