Staging: go7007: Convert driver to use video_ioctl2

go7007: Convert driver to use video_ioctl2

go7007 driver were using the old method of having a big switch for handling
ioctls. Use instead the new video_ioctl2 method.

This patch also adds support for the 2.6.19 new ioctls to enumberate video
formats and intervals.

Still lacking the implementation of compression ioctls needed on go7007.

This patch weren't tested, due to the lack of a hardware with me.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>