Change in coreboot[master]: arch/x86: Set RTC century byte offset in FADT x86-wide

[Arthur Heymans (Code Review)]

Attention is currently required from: Arthur Heymans, Raul Rangel, Mariusz Szafrański, Jonathan Zhang, Patrick Rudolph, Jason Glenesk, Anjaneya "Reddy" Chagam, Marshall Dawson, Johnny Lin, Suresh Bellampalli, Vanessa Eusebio, Michal Motyl, Morgan Jang, Werner Zeh, Felix Held.
Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55012 )

Change subject: arch/x86: Set RTC century byte offset in FADT x86-wide
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Patch Set 2: Code-Review-1

(1 comment)

Patchset:

PS2: 
'for file in $(find -name *.layout); do grep -l "^400" $file; done'

Looks like a lot of mainboards have an option in cmos.layout there...
You might want to explicitly set that byte as reserved in there for all boards. You can check that in C code: see for instance soc/intel/xeon_sp/cpx/romstage.c how this is done.