clover/nir: respect lower to scalar options.

This just calls the lower alu to scalar pass like mesa/st

Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15433>

src/gallium/frontends/clover/nir/invocation.cpp

@@ -501,6 +501,10 @@ binary clover::nir::spirv_to_nir(const binary &mod, const device &dev,
       NIR_PASS_V(nir, nir_opt_dce);
       NIR_PASS_V(nir, nir_lower_convert_alu_types, NULL);
 
+      if (compiler_options->lower_to_scalar) {
+         NIR_PASS_V(nir, nir_lower_alu_to_scalar,
+                    compiler_options->lower_to_scalar_filter, NULL);
+      }
       NIR_PASS_V(nir, nir_lower_system_values);
       nir_lower_compute_system_values_options sysval_options = { 0 };
       sysval_options.has_base_global_invocation_id = true;