MFC 303822-303824
303822
hyperv/ic: Remove never used second parameter of hv_negotiate_version() Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7422
303823
hyperv/ic: Expose the receive buffer length for callers to use. Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7423
303824
hyperv/ic: Pass the channel callback to hv_util_attach() The saved channel callback in util softc is actually never used. Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7424