[media] vivi/mem2mem_testdev: update to latest bus_info specification

Prefix bus_info with "platform:".

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --cc drivers/media/platform/mem2mem_testdev.c
Simple merge

diff --cc drivers/media/platform/vivi.c
Simple merge