MFC 300825,300827,300830,300831,300832,300834

MFC 300825,300827,300830,300831,300832,300834

300825
    hyperv: Move CPUID related bits to hyperv_reg.h and give them clean name

    MFC after:  1 week
    Sponsored by:       Microsoft OSTC
    Differential Revision:      https://reviews.freebsd.org/D6565

300827
    hyperv: Move timer related MSRs into hyperv_reg.h

    And avoid bit fields for event timer.

    MFC after:  1 week
    Sponsored by:       Microsoft OSTC
    Differential Revision:      https://reviews.freebsd.org/D6566

300830
    hyperv/vmbus: Move MSR EOM to hyperv_reg.h

    MFC after:  1 week
    Sponsored by:       Microsoft OSTC
    Differential Revision:      https://reviews.freebsd.org/D6567

300831
    hyperv: GC unneeded bits

    MFC after:  1 week
    Sponsored by:       Microsoft OSTC
    Differential Revision:      https://reviews.freebsd.org/D6568

300832
    hyperv: Clean up Hyper-V timecounter a bit.

    MFC after:  1 week
    Sponsored by:       Microsoft OSTC
    Differential Revision:      https://reviews.freebsd.org/D6569

300834
    hyperv: Test features before enabling optional functionalities

    MFC after:  1 week
    Sponsored by:       Microsoft OSTC
    Differential Revision:      https://reviews.freebsd.org/D6571

git-svn-id: svn://svn.freebsd.org/base/stable/10@302129 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f