K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2017-10-20T00:34:25.364491Z
K 7
svn:log
V 218
mtx: stop testing SCHEDULER_STOPPED in kabi funcs for spin mutexes

There is nothing panic-breaking to do in the unlock case and the lock
case will fallback to the slow path doing the check already.

MFC after:	1 week

END