Mark Johnston e1e33ff912 Initialize DTrace hrtimer frequency during SI_SUB_CPU on i386 and amd64.
This allows the hrtimer to be used earlier during boot. This is required
for boot-time DTrace: anonymous enablings are created during
SI_SUB_DTRACE_ANON, which runs before APs are started. In particular,
the DTrace deadman timer requires that the hrtimer be functional.

MFC after:	2 weeks
2016-04-10 01:23:39 +00:00
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