V4L/DVB (11312): tuner: remove V4L1 code from this driver.

No i2c modules are called with the V4L1 API anymore, so this can be removed.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>