jhibbits 8cdb928f9c Attach dev.cpu nodes on powerpc SMT cores, using only the first found thread
Summary: In order to use cpufreq(4), a dev.cpu attachment must be created.  If
the IBM property is found denoting SMT, attach only to the first thread setup,
so that a cpufreq device can bind.

Reviewed by:	nwhitehorn
Differential Revision: https://reviews.freebsd.org/D15921
2018-06-20 13:30:35 +00:00
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