- Add an entry for the SIIG Cyber 2SP1 PCIe adapter, which is based

- Add an entry for the SIIG Cyber 2SP1 PCIe adapter, which is based
  on an Oxford Semiconductor OX16PCI954 but uses only two ports and
  a non-default clock rate. [1]
- Add entries for the more prominent members of the Digi International
  Neo series, which are based on Exar PCI chips.
  Tested by: Patrick Powell
- Mark some unused parameters as such.
- Fix style/whitespace

PR:		176407 [1]

git-svn-id: svn://svn.freebsd.org/base/stable/10@294961 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f