LU-13790 socklnd: NID to interface mapping issues

LU-13790 socklnd: NID to interface mapping issues

Fix the NID to interface mapping in ksocknal_startup to make sure
the messages go out the interface assigned by LNet on a system
with multiple interfaces configured.

Test-Parameters: trivial
Fixes: b770d7117f35 ("LU-11893 lnet: consoldate secondary IP address handling")
Signed-off-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Change-Id: I22a47fcf17dc0b8b2bf2abebb6b295f4b0550c00
Reviewed-on: https://review.whamcloud.com/39408
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Amir Shehata <ashehata@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Neil Brown <neilb@suse.de>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>