spb-rs1/ipv4: show protocols all Linkey

Linkey BGP --- start 2019-10-29 Connect BGP Error: Hold timer expired

Description:    Linkey/13002/AS-LINKEY
  BGP state:          Connect
    Neighbor address: 31.44.186.141
    Neighbor AS:      13002
    Last error:       BGP Error: Hold timer expired
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable
  Channel ipv6
    State:          DOWN
    Table:          master6
    Preference:     100
    Input filter:   REJECT
    Output filter:  REJECT
    Import limit:   5000
      Action:       disable