drm/omap: omap_display_timings: rename vfp to vfront_porch

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

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/omapdrm/dss/venc.c b/drivers/gpu/drm/omapdrm/dss/venc.c
index 5e8ea7e..77d4c82 100644
--- a/drivers/gpu/drm/omapdrm/dss/venc.c
+++ b/drivers/gpu/drm/omapdrm/dss/venc.c
@@ -270,7 +270,7 @@ const struct omap_video_timings omap_dss_pal_timings = {
 	.hfront_porch	= 12,
 	.hback_porch	= 68,
 	.vsync_len	= 5,
-	.vfp		= 5,
+	.vfront_porch	= 5,
 	.vbp		= 41,
 
 	.interlace	= true,
@@ -291,7 +291,7 @@ const struct omap_video_timings omap_dss_ntsc_timings = {
 	.hfront_porch	= 16,
 	.hback_porch	= 58,
 	.vsync_len	= 6,
-	.vfp		= 6,
+	.vfront_porch	= 6,
 	.vbp		= 31,
 
 	.interlace	= true,