[coreboot-gerrit] Change in coreboot[master]: ifdtool: optimize some code and data type

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/21288 )

Change subject: ifdtool: optimize some code and data type
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Patch Set 6: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/14875/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/59585/ : SUCCESS