MFC 307985-307988
307985
hyperv/hn: Nuke unnecessary M_NETVSC Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8340
307986
hyperv/hn: Move %b format string for capabilities near their definition. Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8341
307987
hyperv/hn: Define empty packet filter. Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8342
307988
hyperv/hn: Shuffle chimney sending buffer alloc/free around. This paves way for more chimney sending buffer reorganization. Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8343