Change in coreboot[master]: nb/intel/i440bx/debug.c: Bugfix and cleanup

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Change subject: nb/intel/i440bx/debug.c: Bugfix and cleanup
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Patch Set 4:

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/14924/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/59645/ : SUCCESS