LU-10391 lnet: introduce lnet_processid for ksock_peer_ni

LU-10391 lnet: introduce lnet_processid for ksock_peer_ni

struct lnet_processid (without the '_') is like lnet_process_id, but
contains a 'struct lnet_nid' rather than lnet_nid_t.

So far it is only used for ksnp_id in struct ksock_peer_ni, and
related functions.

Test-Parameters: trivial
Test-Parameters: serverversion=2.12 serverdistro=el7.9 testlist=runtests
Test-Parameters: clientversion=2.12 testlist=runtests
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I1fea693b1c84ca4c3ac1821f55874ad11519a33b
Reviewed-on: https://review.whamcloud.com/42104
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>