Cleanup pthread locks in ofed RDMA verbs

On FreeBSD, pthread mutex, cond, and spinlocks allocate memory. On
Linux-based systems, these calls do not allocate memory. So there was a
safe assumption that the ofed RDMA verb calls do not need to explicitly
destroy the pthread locks. This assumption is false on FreeBSD. So let
us rearrange the code to cleanup the pthread locks.

Reviewed by: delphij
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D41105

OFED user-space import and update for use with Linux-4.9 compatible RDMA
kernel APIs.

List of sources used:

1) rdma-core was cloned from "https://github.com/linux-rdma/rdma-core.git"
Top commit d65138ef93af30b3ea249f3a84aa6a24ba7f8a75

2) OpenSM was cloned from git://git.openfabrics.org/~halr/opensm.git
Top commit 85f841cf209f791c89a075048a907020e924528d

3) libibmad was cloned from "git://git.openfabrics.org/~iraweiny/libibmad.git"
Tag 1.3.13 with some additional patches from Mellanox.

4) infiniband-diags was cloned from "git://git.openfabrics.org/~iraweiny/infiniband-diags.git"
Tag 1.6.7 with some additional patches from Mellanox.

Added the required Makefiles for building and installing.

Sponsored by: Mellanox Technologies