LU-11370 lnet: cleanup ni_cptlist

LU-11370 lnet: cleanup ni_cptlist

With the changes added for the multi-rail feature,
ni_cptlist related code was removed from
lnet_startup_lndni() and other places. It lurked
behind at few places, cleaning up from there with
this patch

Change-Id: Ied557802df4feb869cea57cb7f44724a550b1ec1
Test-Parameters: trivial
Signed-off-by: Sonia Sharma <sharmaso@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/33155
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Doug Oucharek <dougso@me.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>