Change in coreboot[master]: amd/stoneyridge: Add PSP definitions southbridge and iomap

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Change subject: amd/stoneyridge: Add PSP definitions southbridge and iomap
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Patch Set 4: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/17958/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/62996/ : SUCCESS