K 10
svn:author
V 5
sephe
K 8
svn:date
V 27
2016-02-26T09:23:17.132278Z
K 7
svn:log
V 220
hyperv: Always set device for channels

And unregister hv_device only for primary channels, who own the hv_device.

MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D5451

END