MFC 302723,302726,302731
302723
hyperv: All Hypercall parameters have same alignment requirement. Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D7086
302726
hyperv: Signal event input parameter is shared w/ MNF Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D7087
302731
hyperv/vmbus: Reorganize MNF event sending. Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D7088