[media] ivtv: set max/step to 0 for PTS and FRAME controls

When creating 64 bit integer controls make sure the max and step
values are 0 (as 64 bit controls do not have ranges).

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>