V4L/DVB (6157): Removed the need to manually define .bridge for each card

Moved the field from cx23885_board to cx23885_dev and added code to
iautomatically set the bridge type based on the pci device id.

Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>