Allow > 32-bit physical addresses for TTM bus placement.
--- linux-ppc-3.12/include/drm/ttm/ttm_bo_api.h	2014-08-05 13:47:31.082598913 +0200
+++ linux-ppc-3.12/include/drm/ttm/ttm_bo_api.h	2014-08-05 14:14:54.999755480 +0200
@@ -82,7 +82,7 @@ struct ttm_placement {
  */
 struct ttm_bus_placement {
 	void		*addr;
-	unsigned long	base;
+	resource_size_t	base;
 	unsigned long	size;
 	unsigned long	offset;
 	bool		is_iomem;