LU-11372 o2iblnd: add clarifying comment to ko2iblnd.conf

LU-11372 o2iblnd: add clarifying comment to ko2iblnd.conf

The settings in ko2iblnd.conf are recommended only for
OPA but if other IB cards are present along with
OPA, then these settings are applied across all the
configured IB interfaces.

Change-Id: I6daf1f59a100db4e9c2cd12c255ad33fda274093
Test-Parameters: trivial
Signed-off-by: Sonia Sharma <sharmaso@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/33163
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Amir Shehata <ashehata@whamcloud.com>
Reviewed-by: Doug Oucharek <dougso@me.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>