[M] Change in coreboot[main]: mb/google/brya: fix MRC cache failure for hynix parts

[Paul Menzel (Code Review)]

Attention is currently required from: Nick Vaccaro, Nick Vaccaro, Shelley Chen.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/78335?usp=email )

Change subject: mb/google/brya: fix MRC cache failure for hynix parts
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Patch Set 2:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/78335/comment/3730318c_cff2278c :
PS2, Line 10: Failure to
            : set cs_pi_start_high_in_ect when using these parts will result in an
            : MRC cache failure and DUT will fail to boot.
Thank you for debugging. Is that problem known to the manufacturer, or is it the correct behavior and documented in a datasheet?