MFC 307985-307988

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

git-svn-id: svn://svn.freebsd.org/base/stable/10@308503 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f