Change in coreboot[master]: mb/google/octopus: Add LPDDR4 memory init

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Change subject: mb/google/octopus: Add LPDDR4 memory init
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Patch Set 5: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/67955/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/22435/ : SUCCESS