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 8: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/60674/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/15876/ : SUCCESS