V4L/DVB (4945): Cx88: consolidate cx22702_config structs

There are five cx22702_config structs used by cx88-dvb, only two of which
are unique. This patch removes the duplicates and sets each card to use
one of the two remaining config structs.

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