radv: add helper function to denote if tess is enabled on a pipeline.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/radv_private.h

@@ -982,6 +982,11 @@ static inline bool radv_pipeline_has_gs(struct radv_pipeline *pipeline)
 	return pipeline->shaders[MESA_SHADER_GEOMETRY] ? true : false;
 }
 
+static inline bool radv_pipeline_has_tess(struct radv_pipeline *pipeline)
+{
+	return pipeline->shaders[MESA_SHADER_TESS_EVAL] ? true : false;
+}
+
 struct radv_graphics_pipeline_create_info {
 	bool use_rectlist;
 	bool db_depth_clear;