V4L/DVB (7167): [v4l] Add camera class control definitions

Add all of the recently proposed camera class controls.  These controls
should appear in the next version of the v4l2spec.

Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>