drm/omap: omap_display_timings: rename hbp to hback_porch

In preparation to move the stack to use the generic videmode struct for
display timing information rename the hbp member to hback_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/displays/panel-tpo-td028ttec1.c b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
index 694b2e1..f1cc3fa 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
@@ -48,7 +48,7 @@ static struct omap_video_timings td028ttec1_panel_timings = {
 	.pixelclock	= 22153000,
 	.hfront_porch	= 24,
 	.hsync_len	= 8,
-	.hbp		= 8,
+	.hback_porch	= 8,
 	.vfp		= 4,
 	.vsw		= 2,
 	.vbp		= 2,