[coreboot-gerrit] [XS] Change in coreboot[main]: symbols: Add __maybe_unused flag to region variable symbols

[Julius Werner (Code Review)]

Attention is currently required from: Arthur Heymans, Lean Sheng Tan, Patrick Rudolph, Shuo Liu.

Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81209?usp=email )

Change subject: symbols: Add __maybe_unused flag to region variable symbols
......................................................................

Patch Set 2:

(1 comment)

Patchset:

PS2:
> Since this is a workaround, we didn't intend to spread the changes to a global context.  […]

I mean, I still don't see why you can't just declare it at global scope in the `memory_init.c` file.

I guess I don't really mind adding the `__maybe_unused` either... but if you want to do that please add it t everything (`_name`, `_ename` and `_name_size` for both `DECLARE_REGION` and `DECLARE_OPTIONAL_REGION`), to keep things consistent.