OMAP: DSS2: move timing functions

Move check/set/get_timings() from omap_dss_device to omap_dss_driver.

This is part of a larger patch-set, which moves the control from omapdss
driver to the display driver.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 351c8ab..6a74ea1 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -135,10 +135,10 @@
 	struct omap_dss_device *dssdev = to_dss_device(dev);
 	struct omap_video_timings t;
 
-	if (!dssdev->get_timings)
+	if (!dssdev->driver->get_timings)
 		return -ENOENT;
 
-	dssdev->get_timings(dssdev, &t);
+	dssdev->driver->get_timings(dssdev, &t);
 
 	return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
 			t.pixel_clock,
@@ -153,7 +153,7 @@
 	struct omap_video_timings t;
 	int r, found;
 
-	if (!dssdev->set_timings || !dssdev->check_timings)
+	if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
 		return -ENOENT;
 
 	found = 0;
@@ -172,11 +172,11 @@
 				&t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
 		return -EINVAL;
 
-	r = dssdev->check_timings(dssdev, &t);
+	r = dssdev->driver->check_timings(dssdev, &t);
 	if (r)
 		return r;
 
-	dssdev->set_timings(dssdev, &t);
+	dssdev->driver->set_timings(dssdev, &t);
 
 	return size;
 }