[media] pctv452e: Remove bogus code

Currently, usb_register calls two times with cloned structures, but for
different driver names. Let's remove it.

Signed-off-by: Igor M. Liplianin <liplianin@me.by>
Acked-by: André <Weidemann&lt;Andre.Weidemann@web.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>