FROMGIT: v4l2-ctrl: Add VP9 codec levels

Add menu control for VP9 codec levels. A total of 14 levels are
defined for Profile 0 (8bit) and Profile 2 (10bit). Each level
is a set of constrained bitstreams coded with targeted resolutions,
frame rates, and bitrates.

The definitions have been taken from webm project [1].

[1] https://www.webmproject.org/vp9/levels/



Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Bug: 169874657
Change-Id: I6d147c6b5ced7562da934399d777bca419421109
(cherry picked from commit 5887f075922547908e9a17c50e383426d72c59b6
 https://git.linuxtv.org/svarbanov/media_tree.git

 venus-for-next-v5.10-part2)
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>