VIDEO_CX88_DVB must select DVB_CX22702 (due to its cx22702_attach usage).

This patch fixes kernel Bugzilla #4594
(http://bugzilla.kernel.org/show_bug.cgi?id=4594).
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Acked-by: NJohannes Stezenbach <js@linuxtv.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>