[coreboot-gerrit] Change in coreboot[master]: mb/dell/inspiron_660s: Add initial working port

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Change subject: mb/dell/inspiron_660s: Add initial working port
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Patch Set 2: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/64026/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/18875/ : SUCCESS