[media] cx231xx: let i2c bus scanning use its own i2c_client

This is a preparation for deleting the otherwise useless i2c_clients
that are allocated for all the i2c master adapters.

Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --cc drivers/media/usb/cx231xx/cx231xx-i2c.c
Simple merge

diff --cc drivers/media/usb/cx231xx/cx231xx.h
Simple merge