Change in coreboot[master]: google/kahlee: Move mainboard_ec_init to dev init phase

[build bot (Jenkins) (Code Review)]

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Change subject: google/kahlee: Move mainboard_ec_init to dev init phase
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Patch Set 4: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/56269/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/11866/ : SUCCESS