media: uapi: Move the VP8 stateless control type out of staging

Move the VP8 stateless control types out of staging,
and re-number it to avoid any confusion.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>