[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/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index b47d1e2..0774bf3 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -211,6 +211,7 @@
  * @num_planes:		number of planes in the buffer
  *			on an internal driver queue
  * @planes:		private per-plane information; do not change
+ * @timestamp:		frame timestamp in ns
  */
 struct vb2_buffer {
 	struct vb2_queue	*vb2_queue;
@@ -219,6 +220,7 @@
 	unsigned int		memory;
 	unsigned int		num_planes;
 	struct vb2_plane	planes[VB2_MAX_PLANES];
+	u64			timestamp;
 
 	/* private: internal use only
 	 *