[coreboot-gerrit] Change in coreboot[master]: [WIP] soc/amd/common: factor out SMU code from Picasso

[Jeremy Soller (Code Review)]

Jeremy Soller has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/47483 )

Change subject: [WIP] soc/amd/common: factor out SMU code from Picasso
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Patch Set 2: Code-Review-1

The SMU code here may work on Picasso, and may work on Renoir. However, it is not common to the AM4 CPUs. Matisse, for example, has different values for the REG_ADDR_* constants and also supports 8 arguments instead of 6.