[S] Change in coreboot[main]: util/smmstoretool: add uint64 data type

[Krystian Hebel (Code Review)]

Attention is currently required from: Arthur Heymans, Martin L Roth, Michał Żygowski, Sergii Dmytruk.

Krystian Hebel has posted comments on this change by Sergii Dmytruk. ( https://review.coreboot.org/c/coreboot/+/82611?usp=email )

Change subject: util/smmstoretool: add uint64 data type
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Patch Set 1: Code-Review+1

(3 comments)

File util/smmstoretool/data.c:

https://review.coreboot.org/c/coreboot/+/82611/comment/fcefefa1_1af91884?usp... :
PS1, Line 168: 		data = xmalloc(*data_size);
Nit: this isn't freed until program terminates. It shouldn't make a difference while this tool allows to operate on one variable at a time, but if it ever evolves to support multiple variables in one call it may become an issue.

File util/smmstoretool/main.c:

https://review.coreboot.org/c/coreboot/+/82611/comment/a2b5273e_5761407b?usp... :
PS1, Line 128: 18446744073709551615
I have mixed feelings about such large number. I had to check if this value is correct because I'm 99% sure this is the first time I've seen it in decimal. While it makes sense for smaller sizes (it is what user would write), this is hardly readable, I think `2^64-1` would be better.

https://review.coreboot.org/c/coreboot/+/82611/comment/1437b433_5458e957?usp... :
PS1, Line 131: 	fprintf(f, " * raw (output only; raw bytes on output)\n");
Any plans for writing raw values, e.g. from provided file?