r600/sfn: lower bool to int32 only after common optimizations

Fixes: f79b7fcf7c7f5db626efdb63f27e8bc64d0aed77
   r600/sfn: use 32 bit bools

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7714>
(cherry picked from commit 335c48ab330a5e3d7cc2bdd905eba44a3a80e982)
2 files changed