LU-10391 lnet: change lnet_prep_send to take net_processid

LU-10391 lnet: change lnet_prep_send to take net_processid

Instead of a 'struct lnet_process_id', lnet_prep_send() now takes a
"struct lnet_processid *" with allows larger address.

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: Ibf01340663316e24b6c3053166465293c4f761e1
Reviewed-on: https://review.whamcloud.com/43605
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>