[media] vivid: add core driver code

This is the core driver code that creates all the driver instances
and all the configured devices.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --cc drivers/media/platform/vivid/vivid-core.c
Simple merge

diff --cc drivers/media/platform/vivid/vivid-core.h
Simple merge