LU-6261 gnilnd: Thread-safe optimizations.

LU-6261 gnilnd: Thread-safe optimizations.

Take advantage of improved gni threading.
Do not use gnd_cq_mutex lock for kgni versions that support thread
safe gni api.
Check if version is greater than code rev 0xb9 and use locking of
smsg and rdma on a per connection instead of the global cq lock.
Changed gnc_tx_seq and gnc_rx_seq to atomics.
Added gnc_smsg_mutex and gnc_rdma_mutex per conn to protect the lists
that the messages are placed on.

Signed-off-by: Chris Horn <hornc@cray.com>
Change-Id: Ic03f1877ab7b9632ca5517cd74f7e7fa25ba171b
Reviewed-on: http://review.whamcloud.com/15430
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Reviewed-by: James Shimek <jshimek@cray.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>