[Bug 217822] amdtemp backport to 10.3

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217822

            Bug ID: 217822
           Summary: amdtemp backport to 10.3
           Product: Base System
           Version: 10.3-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: llowrey at nuclearwinter.com

The version of amdtemp in 10.3 lacks the device ID for the temp sensor in the
A10-6700T processor. The device ID is present in the version of amdtemp in
trunk.

I copied the amdtemp.c from trunk into 10.3 and confirmed that the module works
as expected.

IMO this is a low risk change. The change set is minimal, 3 lines and only the
first two changes (adds) are necessary.

82a83
> #define       DEVICEID_AMD_MISC16_M30H        0x1583
95a97
>       { VENDORID_AMD, DEVICEID_AMD_MISC16_M30H },
506c508
< #define       AMDTEMP_ZERO_C_TO_K     2732
---
> #define       AMDTEMP_ZERO_C_TO_K     2731

The last change appears to be a bug fix that should probably be omitted since
users of 10.x would see a (small) behavior change. They'll get it in 11.x but
it'll be their choice.

Is there anything I need to (or can) do to facilitate this backport? What do I
need to do?

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