[coreboot-gerrit] Change in coreboot[master]: device/mmio.h: Add bit field helpers

[Hung-Te Lin (Code Review)]

Hung-Te Lin has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/35463 )

Change subject: device/mmio.h: Add bit field helpers
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Patch Set 13:
> Patch Set 13:
> > Hmm, why is the API mixing host endianness with little-endian
> > in the SET case? Is that intentional?
>
> I think it's just because we didn't have a clrsetbits() primitive that works directly on host endianness, and we don't have a big-endian architecture anyway. It's meant to be host endianness.

Right. If there was clrsetbits32 I'd definitely use them. Julius and I had discussion on this  and the conclusion is there's no active platform using bigendian today in coreboot (the only exception was MIPS, which was going to be dropped) so we can make the change.