[S] Change in coreboot[main]: mb/pcengines/apu2/mainboard: fix up ECC scrubber configuration

[Felix Held (Code Review)]

Attention is currently required from: Alexander Couzens, Krystian Hebel, Michał Żygowski, Nico Huber, Piotr Król.

Felix Held has posted comments on this change by Felix Held. ( https://review.coreboot.org/c/coreboot/+/79612?usp=email )

Change subject: mb/pcengines/apu2/mainboard: fix up ECC scrubber configuration
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Patch Set 8:

(1 comment)

Patchset:

PS8:
> i think i just used what's in the blob repo and iirc that also matched what i pulled form a pre-buil […]

ouch, turns out that the board i tested this on is a version without the 9th dram chip needed for ecc. so this might just work on a board that has the 9th dram chip