FreeBSD/src 8337e2a (r343324)sys/dev/amdtemp amdtemp.c

MFC r340426 (by cem): amdtemp(4): Fix temperature reporting on AMD 2990WX

Update the AMD family 17h temperature reporting based on AMD Tech Doc 56255
OSRR, section 4.2.1.

For CPUS w/CUR_TEMP_RANGE_SEL set, scale the reported temperature into the
range -49..206; i.e., subtract 49°C.

Submitted by:   gallatin@
Reported by:    bcran@
DeltaFile
+13-4sys/dev/amdtemp/amdtemp.c
+13-41 files

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