LU-10391 lnet: alter lnd_notify_peer_down() to take lnet_nid

LU-10391 lnet: alter lnd_notify_peer_down() to take lnet_nid

The lnd_notify_peer_down() interface now takes a large nid.

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: I9926caf0508ff257e9e64d5537597addbce657d7
Reviewed-on: https://review.whamcloud.com/43608
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>