iris: Make intel_hiz_exec public.

Need to use it for fast clearing depth buffers.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/gallium/drivers/iris/iris_resource.h

@@ -222,6 +222,13 @@ void iris_resource_disable_aux(struct iris_resource *res);
 #define INTEL_REMAINING_LAYERS UINT32_MAX
 #define INTEL_REMAINING_LEVELS UINT32_MAX
 
+void
+iris_hiz_exec(struct iris_context *ice,
+              struct iris_batch *batch,
+              struct iris_resource *res,
+              unsigned int level, unsigned int start_layer,
+              unsigned int num_layers, enum isl_aux_op op);
+
 /**
  * Prepare a miptree for access
  *