Change in coreboot[master]: util/sconfig: Get rid of nextdev member in struct device

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Change subject: util/sconfig: Get rid of nextdev member in struct device
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Patch Set 2:

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/73873/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/27984/ : SUCCESS