[XS] Change in coreboot[main]: libpayload: Move ttb_buffer to a standalone section

[Julius Werner (Code Review)]

Attention is currently required from: Yi Chou, Yu-Ping Wu.

Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/79078?usp=email )

Change subject: libpayload: Move ttb_buffer to a standalone section
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Patch Set 5:

(2 comments)

Patchset:

PS5: 
Maybe this would be a good opportunity to fix the _stack/_estack inconsistency as well?

File payloads/libpayload/arch/arm64/mmu.c:

https://review.coreboot.org/c/coreboot/+/79078/comment/90d87306_87bc6966 :
PS5, Line 44: ".ttb_buffer"
You need to actually add this section to all the `payloads/libpayload/arch/*/libpayload.ldscript` scripts though. Depthcharge chooses to maintain its own linker script, but most other payloads use the default one from this repo.