drm/omap: omap_display_timings: rename vsw to vsync_len

In preparation to move the stack to use the generic videmode struct for
display timing information rename the vsw member to vsync_len.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c

@@ -50,7 +50,7 @@ static struct omap_video_timings td028ttec1_panel_timings = {
 	.hsync_len	= 8,
 	.hback_porch	= 8,
 	.vfp		= 4,
-	.vsw		= 2,
+	.vsync_len	= 2,
 	.vbp		= 2,
 
 	.vsync_level	= OMAPDSS_SIG_ACTIVE_LOW,