V4L/DVB (4276): Fix CI on old KNC1 DVBC cards

These cards do not need the tda10021 configuration change when data is
streamed through a CAM module. This disables it for these ones.

Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>