[S] Change in coreboot[master]: lib/Kconfig: Disable `DECOMPRESS_OFAST` for x86_64

[Arthur Heymans (Code Review)]

Attention is currently required from: Nico Huber, Martin L Roth, Angel Pons, Felix Held.

Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68648 )

Change subject: lib/Kconfig: Disable `DECOMPRESS_OFAST` for x86_64
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Patch Set 1:

(1 comment)

File src/lib/Kconfig:

https://review.coreboot.org/c/coreboot/+/68648/comment/19fdb56f_99eb2098 
PS1, Line 121: USE_EXP_X86_64_SUPPORT
Can you use 'ARCH_RAMSTAGE_X86_64' (that's a good enough proxy for needing lzma decompression code + 64bit)? USE_EXP_X86_64_SUPPORT is more like a toggle option and may not be present on some platforms where only 64bit is used, which seems likely to happen at some point.