[S] Change in coreboot[master]: mb/google/skryim: Add RECOVERY_MRC_CACHE FMAP section

[Felix Held (Code Review)]

Attention is currently required from: Jason Nien, Matt DeVillier, Jon Murphy, Martin Roth, Karthik Ramasubramanian.

Felix Held has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/73250 )

Change subject: mb/google/skryim: Add RECOVERY_MRC_CACHE FMAP section
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Patch Set 1:

(1 comment)

File src/mainboard/google/skyrim/chromeos.fmd:

https://review.coreboot.org/c/coreboot/+/73250/comment/471bfa86_6dcb1b1e 
PS1, Line 25: RECOVERY_MRC_CACHE
> any reason not to size the two MRC CACHE regions to 128k (to allow for 64k erase) and have them cont […]

would be good to have some numbers for read, write and erase speed to see if using 120k or 128k is faster in the most common cases. i'm not sure if 64k erases are that much faster compared to 16x 4k erases. also the read case should be much more common than the erase case