V4L/DVB (11830): dib0700: add support for Leadtek WinFast DTV Dongle H

"Leadtek WinFast DTV Dongle H" is a hybrid digital/analog USB-stick TV
receiver. The code below allows the digital part to work with dvb_usb
in linux.

Signed-off-by: tomas petr <tom-petr@seznam.cz>
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>