[media] v4l: Convert drivers to use monotonic timestamps

Convert drivers using wall clock time (CLOCK_REALTIME) to timestamp from the
monotonic timer (CLOCK_MONOTONIC).

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/platform/omap/omap_vout.c b/drivers/media/platform/omap/omap_vout.c
index f7ad541..c74b0d4 100644
--- a/drivers/media/platform/omap/omap_vout.c
+++ b/drivers/media/platform/omap/omap_vout.c
@@ -597,7 +597,7 @@
 		return;
 
 	spin_lock(&vout->vbq_lock);
-	do_gettimeofday(&timevalue);
+	v4l2_get_timestamp(&timevalue);
 
 	switch (cur_display->type) {
 	case OMAP_DISPLAY_TYPE_DSI: