OMAP: DSS2: change manual update scaling setup

Currently the update area on manual update displays is automatically
enlargened to fully cover scaled overlays. This patch makes that
optional, allowing the panel driver to choose if it's used or not.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 66e8e97..5c7940d 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -199,7 +199,8 @@
 void dss_uninit_overlay_managers(struct platform_device *pdev);
 int dss_mgr_wait_for_go_ovl(struct omap_overlay *ovl);
 void dss_setup_partial_planes(struct omap_dss_device *dssdev,
-				u16 *x, u16 *y, u16 *w, u16 *h);
+				u16 *x, u16 *y, u16 *w, u16 *h,
+				bool enlarge_update_area);
 void dss_start_update(struct omap_dss_device *dssdev);
 
 /* overlay */