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/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c
index 2399a6f..3d1b418 100644
--- a/drivers/gpu/drm/omapdrm/omap_connector.c
+++ b/drivers/gpu/drm/omapdrm/omap_connector.c
@@ -50,7 +50,7 @@ void copy_timings_omap_to_drm(struct drm_display_mode *mode,
 	mode->hdisplay = timings->hactive;
 	mode->hsync_start = mode->hdisplay + timings->hfront_porch;
 	mode->hsync_end = mode->hsync_start + timings->hsync_len;
-	mode->htotal = mode->hsync_end + timings->hbp;
+	mode->htotal = mode->hsync_end + timings->hback_porch;
 
 	mode->vdisplay = timings->vactive;
 	mode->vsync_start = mode->vdisplay + timings->vfp;
@@ -84,7 +84,7 @@ void copy_timings_drm_to_omap(struct omap_video_timings *timings,
 	timings->hactive = mode->hdisplay;
 	timings->hfront_porch = mode->hsync_start - mode->hdisplay;
 	timings->hsync_len = mode->hsync_end - mode->hsync_start;
-	timings->hbp = mode->htotal - mode->hsync_end;
+	timings->hback_porch = mode->htotal - mode->hsync_end;
 
 	timings->vactive = mode->vdisplay;
 	timings->vfp = mode->vsync_start - mode->vdisplay;