intel/compiler: Make brw_postprocess_nir take debug_enabled as a parameter

The callers already have this value, and we would like to make it
follow different rules other than stage that might not be visible to
the helper function, so just pass explicitly.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9779>

src/intel/compiler/brw_nir.c

@@ -1077,11 +1077,9 @@ nir_shader_has_local_variables(const nir_shader *nir)
  */
 void
 brw_postprocess_nir(nir_shader *nir, const struct brw_compiler *compiler,
-                    bool is_scalar)
+                    bool is_scalar, bool debug_enabled)
 {
    const struct gen_device_info *devinfo = compiler->devinfo;
-   bool debug_enabled =
-      (INTEL_DEBUG & intel_debug_flag_for_shader_stage(nir->info.stage));
 
    UNUSED bool progress; /* Written by OPT */