[media] Added support for AVerTV Hybrid Express Slim HC81R

This patch provide only analog support.
The device is based on AF9013 demodulator, XC3028 tuner
and CX23885 chipset; subsystem id: 1461:d939

Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>