MFC 305052-305054,305110

MFC 305052-305054,305110

305052
    hyperv/hn: Remove the useless rndis_device and related bits

    Sponsored by:   Microsoft
    Differential Revision:  https://reviews.freebsd.org/D7687

305053
    hyperv/hn: Log packet message alignment.

    Sponsored by:   Microsoft
    Differential Revision:  https://reviews.freebsd.org/D7689

305054
    hyperv/hn: Remove unnecessary NULL check.

    Sponsored by:   Microsoft
    Differential Revision:  https://reviews.freebsd.org/D7690

305110
    hyperv/hn: Consolidate NVS transaction execution.

    Sponsored by:   Microsoft
    Differential Revision:  https://reviews.freebsd.org/D7704

git-svn-id: svn://svn.freebsd.org/base/stable/10@307186 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f