pan/bi: Add bifrost_minmax_mode field

We'll open up a union for class specific data, since this is interesting
only to BI_MINMAX. (And even then...)

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
1 file changed