LU-12302 lnet: Fix NI status in proc for loopback ni

LU-12302 lnet: Fix NI status in proc for loopback ni

The loopback NI is never really "down", but since its associated
ns_status is used for other purposes that's how it is reported in
proc_lnet_nis(). There's an existing check for lolnd so just hardcode
the status as "up" there.

Test-Parameters: trivial
Signed-off-by: Chris Horn <hornc@cray.com>
Change-Id: If3f29dbc08c14aa187b00d680d0045a7dbb7f2d8
Reviewed-on: https://review.whamcloud.com/34871
Reviewed-by: Sonia Sharma <sharmaso@whamcloud.com>
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Amir Shehata <ashehata@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>