Change in coreboot[master]: soc/intel/skylake: Use common EMMC block code

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Change subject: soc/intel/skylake: Use common EMMC block code
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Patch Set 5:

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/69045/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/23402/ : SUCCESS