i965/fs: Add an allow_spilling flag to brw_compile_fs

This allows us to disable spilling for blorp shaders since blorp state
setup doesn't handle spilling.  Without this, blorp fails hard if you run
with INTEL_DEBUG=spill.

Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Tested-by: Francisco Jerez <currojerez@riseup.net>

src/intel/vulkan/anv_pipeline.c

@@ -675,7 +675,8 @@ anv_pipeline_compile_fs(struct anv_pipeline *pipeline,
       unsigned code_size;
       const unsigned *shader_code =
          brw_compile_fs(compiler, NULL, mem_ctx, &key, &prog_data, nir,
-                        NULL, -1, -1, pipeline->use_repclear, &code_size, NULL);
+                        NULL, -1, -1, true, pipeline->use_repclear,
+                        &code_size, NULL);
       if (shader_code == NULL) {
          ralloc_free(mem_ctx);
          return vk_error(VK_ERROR_OUT_OF_HOST_MEMORY);