[media] exynos-gsc, m2m-deinterlace, mx2_emmaprp: Copy v4l2_buffer data from src to dst

The timestamp and timecode fields were copied from destination to source,
not the other way around as they should. Fix it.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>