Update hardware section:

• Document existing support for:
  • CMD 646U2
  • Highpoint HPT372N
  • Intel 6300ESB
  • Intel ICH7
  • Nvidia nForce2 MCP
  • Nvidia nForce3 MCP
  • Nvidia nForce3 Pro
  • Nvidia nForce4
  • Promise PDC20571
  • Promise PDC20575
  • Promise PDC20579
  • Promise PDC20580
  • Promise PDC20621
  • Promise PDC20622
  • Promise PDC40518
  • Promise PDC40519
  • SIS 180
  • SIS 181
  • SIS 182
  • SIS 965
  • VIA VT6410
  • VIA VT6420
  • VIA VT6421

• Remove HPT366 duplicate

Approved by: brueffer (mentor)