amdtemp: Add Hygon Dhyana support

[puwen_hygon.cn]

Summary

Enable the on-die thermal sensors for Hygon Dhyana family 18h processor.

[cem]

Generally please upload phabricator diffs with more context. The arcanist tool can help do that easily. Or if you prefer the manual process, please generate patches with -U99999.

sys/dev/amdtemp/amdtemp.c

48

What’s the need?

112

Is this the right place to be defining this?

305

I don’t think there’s any good reason for this change.

[puwen_hygon.cn]

In D23560#517197, @cem wrote:

Generally please upload phabricator diffs with more context. The arcanist tool can help do that easily. Or if you prefer the manual process, please generate patches with -U99999.

Thanks for suggestion, already generate patches with -U999999, and upload the diffs by following "Create a Revision via Web Interface" of https://wiki.freebsd.org/Phabricator. Is the extra context stripped by the web interface? I'll take more care when using the web interface in future.

sys/dev/amdtemp/amdtemp.c

48

To use CPU_VENDOR_HYGON for compiling.

112

The definition VENDORID_HYGON just follow the stuff of VENDORID_AMD.

305

For the reason for amdsmn, it is used to distinguish different CPU family series to reduce future maintenance burden.

[puwen_hygon.cn]

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