LU-6735 lnet: select appropriate optimization options for ko2iblnd

LU-6735 lnet: select appropriate optimization options for ko2iblnd

In order to support different IB cards in the best way we need to have
ability to select appropriate optimization options for ko2iblnd
according IB cards installed on the system.

The different defaults for different IB cards are selected by aliases
from /etc/modprobe.d/ko2iblnd.conf and customer can change them manually.

In this patch the general mechanism of selecting tunables is proposed.
If TrueScale IB cards are inserted a new optimal tunables are selected.

With proposed tunables the performance with TrueScale IB cards gets up
from 900 MB/sec to 2.2 GB/sec.

Change-Id: Ie296599f8b0c923100aac41994cbb9b49f99decf
Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-on: http://review.whamcloud.com/15313
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Amir Shehata <amir.shehata@intel.com>