This patch synchronizes current bttv support on V4L with linux kernel and
adds support to Adlink RTV24 card.

It is asked that *every* patch to V4L stuff to be first submitted to
video4linux-list@redhat.com.

From: "J.A. Magallon" <jamagallon@able.es>

	struct bttv defined after usage.
Signed-off-by: NMauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: NPeter Skipworth <pskipworth@clarityvi.com>
Signed-off-by: NNickolay V Shmyrev <nshmyrev@yandex.ru>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>