MFC r200641,200676
MFC r200641,200676

r200641:
  Document newly added loader tunable and sysctl variables.
   o hw.vge.msi_disable
   o dev.vge.%d.int_holdoff
   o dev.vge.%d.rx_coal_pkt
   o dev.vge.%d.tx_coal_pkt

r200676:
  Document more VIA Velocity family controllers to vge(4). Previously
  it mentioned only VT6122. While I'm here remove the mention of
  VT3119 which seems to be VIA's internal model name and VT3119
  wouldn't be available to end users.

  Reviewed by:  brueffer

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase