Write 'edd' instead of 'ethX' for fcoe= dracut parameter.
    
    dracut-004-52 has changed so that the network device name is not required in
    the fcoe= parameter.  We still need to determine if we need to pass dcb or
    nodcb though.
    
    Related: rhbz#692939
    (cherry picked from commit 03890d9bad5a34225650a9bbb6383016120d6876)