Since commit f6b6f15b54 ("libcamera: pipeline: Introduce
stopDevice()") the stop function needed to be implemented by pipeline
handlers was renamed to stopDevice().
Update the pipeline handler writers guide to match this.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jai Luthra <jai.luthra@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>