FROMGIT: media: v4l2-ctrls: Add control for AUD generation

Add a control to enable inserting of AUD NALU into encoded
bitstream.

Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
(cherry picked from commit f2bf1bcb
 git://linuxtv.org/media_tree.git master)
Bug: 175378288
Link: https://lkml.org/lkml/2021/1/19/456



Change-Id: I3d4a8a6801b3a3eb56d8a1ba79203bda7176cbff
Signed-off-by: Dikshita Agarwal <dikshita@codeaurora.org>