V4L/DVB (11311): v4l: replace 'ioctl' references in v4l i2c drivers

Replace 'VIDIOC_' references in v4l i2c drivers by their new v4l2_subdev
callback names.

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