K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2017-09-07T21:31:07.624902Z
K 7
svn:log
V 429
x86 MCA: Enable AMD thresholding support on 17h

17h supports MCA thresholding in the same way as 16h and earlier.
Supposedly a ScalableMca feature bit in CPUID 8000_0007:EBX must be set, but
that was not true for earlier models, so be careful about relying on it.

While here, document a missing bit in LS MCA MISC0.

Reviewed by:	truckman
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D12237

END