OMAPDSS: MANAGER: Check LCD related overlay manager parameters

The LCD related manager configurations are a part of the manager's private data
in APPLY. Pass this to dss_lcd_mgr_config to dss_mgr_check and create a function
to check the validity of some of the configurations.

To check some of the configurations, we require information of interface to
which the manager output is connected. These can be added once interfaces are
represented as an entity.

Signed-off-by: Archit Taneja <archit@ti.com>
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 80ed88f..f87a431 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -244,6 +244,7 @@
 int dss_mgr_check(struct omap_overlay_manager *mgr,
 		struct omap_overlay_manager_info *info,
 		const struct omap_video_timings *mgr_timings,
+		const struct dss_lcd_mgr_config *config,
 		struct omap_overlay_info **overlay_infos);
 
 static inline bool dss_mgr_is_lcd(enum omap_channel id)