Hardware driver update from Mellanox Technologies, including:
 - improved performance
 - better stability
 - new features
 - bugfixes

Supported HCAs:
 - ConnectX-2
 - ConnectX-3
 - ConnectX-3 Pro

Sponsored by:	Mellanox Technologies
MFC after:	1 week


git-svn-id: svn+ssh://svn.freebsd.org/base/head@272027 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f