OMAPDSS: Apply manager timings instead of direct DISPC writes

Replace the function dispc_mgr_set_timings() with dss_mgr_set_timings() in the
interface drivers. The latter function ensures that the timing related DISPC
registers are configured according to the shadow register programming model.

Remove the call to dispc_mgr_go() in dpi_set_timings() as the manager's go bit
is set by dss_mgr_set_timings().

Signed-off-by: Archit Taneja <archit@ti.com>
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 56f6e9c..8d4ff8c 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -376,7 +376,7 @@
 	dispc_enable_gamma_table(0);
 
 	/* tv size */
-	dispc_mgr_set_timings(dssdev->manager->id, &dssdev->panel.timings);
+	dss_mgr_set_timings(dssdev->manager, &dssdev->panel.timings);
 
 	hdmi.ip_data.ops->video_enable(&hdmi.ip_data, 1);