K 10
svn:author
V 2
bz
K 8
svn:date
V 27
2015-11-09T17:57:32.102148Z
K 7
svn:log
V 435
Now that the PMU implementation is independent of HWPMC
as of r288992 use it to manage the CCNT.

Use the CNNT for get_cyclecount() instead of binuptime() when device pmu
is compiled in; if it fails to attach, fall back to the former method.

Enable by default for the BeagleBoneBlack configuration.

Optained from:		Cambridge/L41
Sponsored by:		DARPA/AFRL
Reviewed by:		andrew
Differential Revision:	https://reviews.freebsd.org/D3837

END