winverbs/ND: fix calculating RDMA read/write address

winverbs/ND: fix calculating RDMA read/write address

The RDMA address should be base + offset, in network byte order.  Rather
than trying to convert the offset into network byte order, then add that
to the base, which is already in network byte order, we need to convert
the base to host order, add the offset, then convert the results back.

This allows the winverbs ND provider to pass the ndmw test.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
git-svn-id: svn://openib.tc.cornell.edu/gen1@2619 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86