Add support for the SIIG Cyber 2S PCIe adapter.  It is based on an Oxford Semiconductor OX16PCI954 but uses only two ports with a non-default clock rate.
Add support for the SIIG Cyber 2S PCIe adapter.  It is based on an
Oxford Semiconductor OX16PCI954 but uses only two ports with a non-default
clock rate.

PR:		kern/152034
Tested by:	Hans Fiedler  hans of hermes louisville edu
MFC after:	1 week

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