[media] media: videobuf2: Move timestamp to vb2_buffer

Move timestamp from struct vb2_v4l2_buffer to struct vb2_buffer
for common use, and change its type to u64 in order to handling
y2038 problem. This patch also includes all device drivers' changes related to
this restructuring.

Signed-off-by: Junghak Sung <jh1009.sung@samsung.com>
Signed-off-by: Geunyoung Kim <nenggun.kim@samsung.com>
Acked-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
index 534b50a..f40755c 100644
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -331,7 +331,7 @@
 		/* one frame is displayed If next frame is
 		 *  available, release cur_frm and move on */
 		/* Copy frame display time */
-		v4l2_get_timestamp(&common->cur_frm->vb.timestamp);
+		common->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
 		/* Change status of the cur_frm */
 		vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 					VB2_BUF_STATE_DONE);
@@ -387,8 +387,8 @@
 			if (!channel_first_int[i][channel_id]) {
 				/* Mark status of the cur_frm to
 				 * done and unlock semaphore on it */
-				v4l2_get_timestamp(
-					&common->cur_frm->vb.timestamp);
+				common->cur_frm->vb.vb2_buf.timestamp =
+						ktime_get_ns();
 				vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 						VB2_BUF_STATE_DONE);
 				/* Make cur_frm pointing to next_frm */