V4L/DVB (6507): bttv: whitespace cleanup

Someone wasn't using the v4l-dvb commit scripts and so didn't run the
automatic whitespace cleaner on their code.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>