[coreboot-gerrit] Change in coreboot[master]: device/dram/ddr2.c: Improve error returning and debug output

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Change subject: device/dram/ddr2.c: Improve error returning and debug output
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Patch Set 2: Verified-1

Build Failed

https://qa.coreboot.org/job/coreboot-gerrit/60209/ : ABORTED

https://qa.coreboot.org/job/coreboot-checkpatch/15436/ : SUCCESS