[M] Change in coreboot[main]: Makefile.mk: Use one line per *_common flag

[Nico Huber (Code Review)]

Attention is currently required from: Felix Singer.

Nico Huber has posted comments on this change by Felix Singer. ( https://review.coreboot.org/c/coreboot/+/83226?usp=email )

Change subject: Makefile.mk: Use one line per *_common flag
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Patch Set 2:

(1 comment)

Patchset:

PS2:
> I don't like this rule at all. […]

I didn't mean this as a general rule. Just for people who want
to do bulk style changes without hurting the project. Style
changes in general are not bad. It's just bulk changes to adapt
to ones own liking that cause trouble.

Of course people can just adapt and be done with it. But there
are deeper psychological aspects, e.g. somebody who just had to
adapt due to bikeshedding might just give up when they are hit
by controversial bulk changes on top. With that in mind, I think
it just needs balance, a trade-off between cleaning things up
and creative work.

Please keep in mind that a lot of the creative coreboot work is
done unpaid. And unpaid people can just choose not to update
their changes.