[media] media: cx23885: fix type of allowed_protos

Protocol lists are represented as 64-bit bitmaps,
therefore use u64 instead of unsigned long.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>