LU-10391 socklnd: switch ksocknal_del_peer to lnet_processid

LU-10391 socklnd: switch ksocknal_del_peer to lnet_processid

ksocknal_del_peer now takes a pointer to a lnet_processid,
with room for a large address.
A NULL means "ANY NID, AND PID".
The "ip" argument was completely unused, so has been removed.

This was the last use of 'struct lnet_process_id' in ksocklnd.

Test-Parameters: trivial testlist=sanity-lnet
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: I2f3879fdafc9b1effd540af3644febf0d06eb5e2
Reviewed-on: https://review.whamcloud.com/44623
Reviewed-by: James Simmons <jsimmons@infradead.org>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>