mb/google/rex: Update Rex Flash Layout

This patch updates the Rex flash layout to allow CSE Lite FW
update and accommodate multiple ESx SoC stepping blobs.

For default chromeos.fmd

SI_BIOS:
     RW_SECTION_A/B: Increased by ~1.9MB.
     RW_LEGACY: Reduce to 1MB.
     RW_MISC: Reduce to 152KB.
        - Drop RW_SPD_CACHE
	- Optimize other sections

Additionally, moved RW_LEGACY under extended BIOS region.

For chromeos-debug-fsp.fmd

SI_BIOS:
     RW_SECTION_A/B: Increased by ~1.2MB.
     RW_LEGACY: Dropped
     RW_MISC: Reduce to 152KB.
        - Drop RW_SPD_CACHE
	- Optimize other sections

BUG=b:262868089
TEST=Able to enable CSE update on google/rex and have free space
to add one more PUNIT FW for support different SoC stepping.

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I6146b36c4ce2c0141277eeb906d6ad1f503f3c78
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66288
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>

0 files changed, 0 insertions, 0 deletions