LU-10391 lnet: change lnet_*_peer_ni to take struct lnet_nid

LU-10391 lnet: change lnet_*_peer_ni to take struct lnet_nid

lnet_add_peer_ni() and lnet_del_peer_ni() now take
struct lnet_nid rather than lnet_nid_t.

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: I48bbed96fddea509b27dee131e134aa7b35ae68c
Reviewed-on: https://review.whamcloud.com/44625
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>