[coreboot-gerrit] Change in coreboot[master]: mainboard/google/kahlee: Update Kconfig string used in makefiles

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Change subject: mainboard/google/kahlee: Update Kconfig string used in makefiles
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Patch Set 1: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/63969/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/18827/ : SUCCESS