Change in coreboot[master]: cpu/intel/haswell: Use postcar stage and common CAR code

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Change subject: cpu/intel/haswell: Use postcar stage and common CAR code
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Patch Set 8: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/21296/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/66688/ : SUCCESS