K 10
svn:author
V 5
sephe
K 8
svn:date
V 27
2016-08-22T07:34:39.819405Z
K 7
svn:log
V 312
hyperv/hn: Move chimney sending buffer to hn_softc

And don't recreate chimney sending buffer 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/D7574

END