Now query/enum_dv_timings finally work again.

The timings API patches and the core ioctl changes clearly sailed right past
each other without realizing that both needed to adapt to the other.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>