media: core: export v4l2_translate_cmd

video_translate_cmd() can be useful for drivers to convert between the
VIDIOC_*32 and VIDIOC_ defines. Let's export it.

Now that the function is exported, use this opportunity to rename the
function with the v4l2_ prefix, that is less ambiguous than video_

The VIDIOC_*32 defines are not accessible by the drivers, they live in
v4l2-compat-ioctl32.c.

Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Link: https://lore.kernel.org/r/20250701-uvc-grannular-invert-v4-6-8003b9b89f68@chromium.org


Signed-off-by: Hans de Goede <hansg@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>