LU-17665 lnet: lock primary NID only on lustre-built peer

LU-17665 lnet: lock primary NID only on lustre-built peer

Primary NID locking is useful when client is connecting to a server
and peer representation of the server is provided to LNet by Lustre
via LNetAddPeer API - as interpreted from the mount command string
or llog.

When the server responds to a client, there's no need to lock
the client's primary NID.

Signed-off-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Change-Id: Ifd3098b93ad2e490659eb4adbf676cba4cbdc424
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/54539
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: Cyril Bordage <cbordage@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>