Replace the two open-coded implementations of a link representation with the operator<< overload string representation to simplify the code and unify appearance of reporting MediaLinks. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>