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

[Yi Chou (Code Review)]

Attention is currently required from: Julius Werner, Yu-Ping Wu.

Yi Chou 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 6:

(2 comments)

Patchset:

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

Added another CL for that:
https://review.coreboot.org/c/coreboot/+/79144

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

https://review.coreboot.org/c/coreboot/+/79078/comment/3754c180_23fad487 :
PS5, Line 44: ".ttb_buffer"
> Added it into the `payloads/libpayload/arch/arm64/libpayload.ldscript`. […]

Done