MFC 302733,302737,302801-302806

MFC 302733,302737,302801-302806

302733
    hyperv/vmbus: Remove unused code

    Sponsored by:   Microsoft OSTC
    Differential Revision:  https://reviews.freebsd.org/D7089

302737
    hyperv/vmbus: Cleanup channel rescind

    Sponsored by:   Microsoft OSTC
    Differential Revision:  https://reviews.freebsd.org/D7090

302801
    hyperv/vmbus: Remove unused bits

    Sponsored by:   Microsoft OSTC
    Differential Revision:  https://reviews.freebsd.org/D7091

302802
    hyperv: hv_guid -> struct hyperv_guid.

    This paves way for the further cleanup/disentangle.

    Sponsored by:   Microsoft OSTC
    Differential Revision:  https://reviews.freebsd.org/D7092

302803
    hyperv/vmbus: Move channel offer message definition to vmbus_reg.h

    - Avoid bit fields.
    - Avoid unnecessary indirection.

    Sponsored by:   Microsoft OSTC
    Differential Revision:  https://reviews.freebsd.org/D7093

302804
    hyperv/vmbus: Switch to vmbus channel message macros

    Prepare for more cleanup.

    Sponsored by:   Microsoft OSTC
    Differential Revision:  https://reviews.freebsd.org/D7094

302805
    hyperv/vmbus: Remove unused bits

    Sponsored by:   Microsoft OSTC
    Differential Revision:  https://reviews.freebsd.org/D7095

302806
    hyperv/vmbus: Get rid of rel{_id,id}, use channel id consistently.

    Sponsored by:   Microsoft OSTC
    Differential Revision:  https://reviews.freebsd.org/D7100

git-svn-id: svn://svn.freebsd.org/base/stable/10@307026 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f