nir/lower_amul: Add a variable mode check

This loop should only apply to UBOs and SSBOs because max_slot is never
used for normal uniforms.

Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5966>
1 file changed