FROMGIT: media: v4l2-ctrl: Make display delay and display enable std controls

Make display delay and display delay enable MFC controls standard v4l
controls. This will allow reuse of the controls for other decoder
drivers. Also the new proposed controls are now codec agnostic because
they could be used for any codec.

Acked-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 9f3d1056
 git://linuxtv.org/media_tree.git master)
Bug: 183580457
Link: https://lkml.org/lkml/2021/1/15/171



Change-Id: I06f0c5e08986965ff5808d1c320f1680c019f05d
Signed-off-by: Dikshita Agarwal <dikshita@codeaurora.org>