[ofw] rdma cm support through winverbs has been merged into the trunk

[Sean Hefty]

I've tested the winverbs code using librdmacm and libibverbs sample programs.
The IBAL CM interfaces have been tested using cmtest.  If there are other
applications that I can easily test with, just let me know.

This fixes the winverbs userspace library build, which is needed for the
libibverbs, libibumad, libibmad, and ib-diags ports.

- Sean