[coreboot-gerrit] Change in coreboot[master]: devicetree: Add method to delete property by name

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Change subject: devicetree: Add method to delete property by name
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Patch Set 12: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/29325/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/75268/ : SUCCESS