Change in coreboot[master]: arch/x86: Enable ebda library for romstage and postcar

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Change subject: arch/x86: Enable ebda library for romstage and postcar
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Patch Set 3: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/15142/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/59882/ : SUCCESS