[media] dib9000: Get rid of the remaining DVBv3 legacy stuff

dib9000 is almost ok, with regards to the usage of DVBv5 parameters.
It has just a few stuff using the old way, at set_frontend.

Replace them by the DVBv5 way, and add the delivery system.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>