[S] Change in coreboot[master]: mendocino: Print content of version file

[Paul Menzel (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Jakub Czapiga, Matt DeVillier, Grzegorz Bernacki, Fred Reitberger, Karthik Ramasubramanian, Felix Held.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74269 )

Change subject: mendocino: Print content of version file
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Patch Set 1:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/74269/comment/90e7e3a1_5a454fd6 
PS1, Line 9: This commit adds printing content of 'fsp_version'
           : file at ramstage.
Fits in one line (72 characters)?

https://review.coreboot.org/c/coreboot/+/74269/comment/de184235_6ca11cac 
PS1, Line 11: 
Please add the motivation. Something like (made up by me):
> To process bug reports, it’s useful to have the blob versions in the coreboot log, so print out the versions from the file stored in CBFS. Note, if the blobs are updated, but the file is not, the versions differ.

File src/soc/amd/mendocino/fsp_version.c:

https://review.coreboot.org/c/coreboot/+/74269/comment/f9be330f_412b2f7d 
PS1, Line 17: (int)size
Why the cast? `size_t` has the length modifier `z`.