V4L/DVB (6919): Kconfig: VIDEO_CX23885 must select DVB_TUNER_XC5000 if !DVB_FE_CUSTOMIZE

Everybody forgets to add the Kconfig stuff after they add new card support :-/

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>