[XS] Change in coreboot[main]: payloads/edk2: set VARIABLE_SUPPORT=SMMSTORE on CONFIG_SMMSTORE_V2

[Sergii Dmytruk (Code Review)]

Attention is currently required from: Benjamin Doron, Lean Sheng Tan, Martin L Roth, Matt DeVillier, Sean Rhodes.

Sergii Dmytruk has posted comments on this change by Sergii Dmytruk. ( https://review.coreboot.org/c/coreboot/+/83737?usp=email )

Change subject: payloads/edk2: set VARIABLE_SUPPORT=SMMSTORE on CONFIG_SMMSTORE_V2
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Patch Set 1:

(1 comment)

Patchset:

PS1:
> this is already set for my repo via `payloads/external/edk2/Kconfig` ln 322, I'd just drop that cond […]

Thanks, I did not look there, thus decided to move this option to `Makefile` for consistency.  Also `CONFIG_SMMSTORE_V2` is the correct option to check given that EDK won't work with version 1.