[coreboot-gerrit] Change in coreboot[master]: include: always unsigned long for size_t

[Paul Menzel (Code Review)]

Attention is currently required from: Jacob Garber.
Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55075 )

Change subject: include: always unsigned long for size_t
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Patch Set 1:

(1 comment)

Patchset:

PS1: 
Example build failure:

```
    CC         verstage/commonlib/bsd/cbfs_mcache.o
In file included from src/commonlib/bsd/include/commonlib/bsd/cbfs_private.h:42,
                 from src/commonlib/bsd/cbfs_mcache.c:4:
src/commonlib/bsd/cbfs_mcache.c: In function 'cbfs_mcache_build':
src/include/cbfs_glue.h:23:36: error: format '%zx' expects argument of type 'size_t', but argument 6 has type 'long unsigned int' [-Werror=format=]
 #define LOG(...) printk(BIOS_INFO, "CBFS: " __VA_ARGS__)
                                    ^~~~~~~~
src/commonlib/bsd/cbfs_mcache.c:86:2: note: in expansion of macro 'LOG'
  LOG("mcache @%p built for %d files, used %#zx of %#zx bytes\n", mcache,
  ^~~
src/commonlib/bsd/cbfs_mcache.c:86:54: note: format string is defined here
  LOG("mcache @%p built for %d files, used %#zx of %#zx bytes\n", mcache,
                                                   ~~~^
                                                   %#lx
```

The length modifier `z` also needs to be redefined?

Do you think it’s a good idea to divert from the use in other projects?