nir/lower_blend: refactor logicop variables

This pulls out the logicop_func variable from the options struct, so we can
modify it in the next commit in a central place. It then refactors out the
format variable from the options struct since we end up duplicating
options->format[rt] a zillion times and passing in both an options struct and a
logicop func override is confusing so this will just make everything neater and
self-contained next commit.

no functional change.

Cc'd to make the next commit cherrypickable.

Cc: mesa-stable
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34426>
1 file changed