media: v4l2-ctrls: add support for V4L2_CTRL_WHICH_MIN/MAX_VAL

Add the capability of retrieving the min and max values of a
compound control.

[Ricardo: Added static to v4l2_ctrl_type_op_(maximum|minimum) proto]
[Ricardo: Fix documentation]

Signed-off-by: Yunke Cao <yunkec@google.com>
Tested-by: Yunke Cao <yunkec@google.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Link: https://lore.kernel.org/r/20250203-uvc-roi-v17-2-5900a9fed613@chromium.org


Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
[hverkuil: fix small alignment checkpatch warning]