MFC 312689, 312690
Approved by: sephe (mentor)
r312689
hyperv/hn: add a sysctl name for the VF interface This makes it easier for the userland script to find the releated VF interface. Reviewed by: sephe Approved by: sephe (mentor) Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D9101
r312690
hyperv/hn: add devctl_notify for VF_UP/DOWN events Reviewed by: sephe Approved by: sephe (mentor) Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D9102