Listen *timeout* seconds to become initialized as a DEP Target.

        The PN531 can be set to listen as a DEP Target for passive and
        active communication mode.

def listen_dep(self, target, timeout):
        """Listen *timeout* seconds to become initialized as a DEP Target.

        The PN531 can be set to listen as a DEP Target for passive and
        active communication mode.

        """
        return super(Device, self).listen_dep(target, timeout)