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.

Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: Peter Skipworth <pskipworth@clarityvi.com>
Signed-off-by: Nickolay V Shmyrev <nshmyrev@yandex.ru>