Change in coreboot[master]: mainboard/google/poppy: Add support for ELAN device

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Change subject: mainboard/google/poppy: Add support for ELAN device
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Patch Set 4: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/10810/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/55130/ : SUCCESS