Merge branch '2023-05-31-cleanup-unaligned-access-macros' into next

To quote the author:

There are two versions of get/set_unaligned, get_unaligned_be64,
put_unaligned_le64 etc in U-Boot causing confusion (and bugs).

In this patch-set, I'm trying to fix that with a single unified version of
the access macros to be used across all archs. This work is inspired by
similar changes in this Linux kernel by Arnd Bergman,
https://lore.kernel.org/lkml/20210514100106.3404011[email protected]/