[coreboot-gerrit] Change in coreboot[master]: post_code: replace postcode constants in mainboard EC init

[Patrick Rudolph (Code Review)]

Patrick Rudolph has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/43595 )

Change subject: post_code: replace postcode constants in mainboard EC init
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Patch Set 1: Code-Review+2

The post codes should be moved to the calling code in a follow up, to remove those duplicates.