[media] dvb_usb_v2: move I2C adapter code to different file

No worth to keep it on own file as it is only 30 LOC.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2 files changed