moved some standard stuff from avr.cfg to std.cfg

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Some preliminary cleanups for #5414.

[chrchr-github]

I think the macros like UINT32_C(x) should just be uint32_t(x). At the moment, a 64bit value is created e.g. on unix64.
That seems to cause

compareValueOutOfTypeRangeError
ftp://ftp.de.debian.org/debian/pool/main/libr/librandomx/librandomx_1.1.10.orig.tar.gz
head RandomX-1.1.10/src/argon2_core.c:197:6: style: Comparing expression of type 'const unsigned int' against value 0. Condition is always false. [compareValueOutOfTypeRangeError]
head RandomX-1.1.10/src/argon2_core.c:201:6: style: Comparing expression of type 'const unsigned int' against value 4294967295. Condition is always false. [compareValueOutOfTypeRangeError]

Although we should also warn for 32bit values, unless I'm missing something.

[firewave]

Thanks for pointing that out.
I wanted to add some tests for this but forgot to switch it to a draft. Will do that in the other PR.