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

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/26693 )

Change subject: devicetree: Add method to delete property by name
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Patch Set 7:

Build Failed

https://qa.coreboot.org/job/coreboot-gerrit/73949/ : FAILURE

https://qa.coreboot.org/job/coreboot-checkpatch/28062/ : SUCCESS