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/dss/rfbi.c b/drivers/gpu/drm/omapdrm/dss/rfbi.c
index 32b87bf..0f721fb 100644
--- a/drivers/gpu/drm/omapdrm/dss/rfbi.c
+++ b/drivers/gpu/drm/omapdrm/dss/rfbi.c
@@ -860,7 +860,7 @@ static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 	 */
 	rfbi.timings.hsync_len = 1;
 	rfbi.timings.hfront_porch = 1;
-	rfbi.timings.hbp = 1;
+	rfbi.timings.hback_porch = 1;
 	rfbi.timings.vsw = 1;
 	rfbi.timings.vfp = 0;
 	rfbi.timings.vbp = 0;