Change in coreboot[master]: purism/librem13v2: Clean up devicetree

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Change subject: purism/librem13v2: Clean up devicetree
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Patch Set 3: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/10667/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/54977/ : SUCCESS