OMAPDSS: remove dsi videomode from dssdev

DSI videomode is no longer needed in the omap_dss_device, so remove it.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

include/video/omapdss.h

@@ -632,7 +632,6 @@ struct omap_dss_device {
 
 		enum omap_dss_dsi_pixel_format dsi_pix_fmt;
 		enum omap_dss_dsi_mode dsi_mode;
-		struct omap_dss_dsi_videomode_timings dsi_vm_timings;
 	} panel;
 
 	struct {