[coreboot-gerrit] Change in coreboot[master]: southbridge/amd: Move spi driver to use spi_bus_map

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Change subject: southbridge/amd: Move spi driver to use spi_bus_map
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Patch Set 4:

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/9899/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/54164/ : SUCCESS