K 10
svn:author
V 5
sephe
K 8
svn:date
V 27
2016-04-07T05:45:49.426635Z
K 7
svn:log
V 410
hyperv/vmbus: Use default mtx for channel message queue

First of all sema_post() can't be called w/ spinlock, and the channel
message queue processing is not on hot code path, i.e. spinlock is not
necessary.

Submitted by:	Jun Su <junsu microsoft com>
Reviewed by:	sephe, Dexuan Cui <decui microsoft com>
MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D5812

END