[media] Force xc5000 firmware loading for NetUP Dual DVB-T/C CI RF card

Two xc5000 tuners connected to same i2c bus.
Experiments shows that situation when one tuner is not initialized
while other is tuned to channel causes TS errors.

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>