TODO

   1 - review class names
   2
   3 Setpci:
   4 - auto-width
   5 - extend the register table
   6
   7 Capabilities with partial decoding:
   8 - PCIe 2nd set of control/status registers (have spec)
   9 - HyperTransport caps (have spec)
  10
  11 Capabilities with no decoding:
  12 - CompactPCI hot-swap
  13 - CompactPCI central resource control
  14 - AGP3
  15 - Secure device
  16 - Power Budgeting (ext'd, needs write access to enumerate)
  17 - Root Complex * (ext'd)
  18 - Multi-Function Virtual Channel (ext'd)
  19 - Root Bridge Control Block (ext'd)
  20
  21 PCIIDS:
  22 - delete old DB at SF