clone method

Implementation

@override
Ace4SnoopCluster clone() => Ace4SnoopCluster(
      idWidth: acIntf.idWidth,
      addrWidth: acIntf.addrWidth,
      userWidth: acIntf.userWidth,
      dataWidth: cdIntf.dataWidth,
      domainWidth: acIntf.domainWidth,
      useBar: acIntf.useBar,
    );