K 10
svn:author
V 5
sephe
K 8
svn:date
V 27
2016-08-19T05:43:28.543056Z
K 7
svn:log
V 278
hyperv/hn: Move RXBUF to hn_softc

And don't recreate RXBUF for each primary channel open, it is now
created in device_attach DEVMETHOD and destroyed in device_detach
DEVMETHOD.

MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D7556

END