IB/user_mad: Use new start/end port functions
IB/user_mad: Use new start/end port functions

Use the new common rdma_[start|end]_port functions instead of using
local variables and figuring it out on the fly.

Signed-off-by: Ira Weiny <5535a83d6b33e2bc00edcbbbebec5c5b8e5537a3@intel.com>
Signed-off-by: Doug Ledford <f35204f44eabfe97bbcdd18aee9e9fffc59f29e1@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs