media: uvcvideo: Remove duplicated cap/out code

The *_vid_cap and *_vid_out helpers seem to be identical:
- Remove all the cap/out duplicated code.
- Remove s/g_parm helpers
- Reorder uvc_ioctl_ops

And now that we are at it, fix a comment for uvc_acquire_privileges()

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Link: https://lore.kernel.org/r/20241202-uvc-dup-cap-out-v3-1-d40b11bb74b7@chromium.org


Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>