[S] Change in coreboot[main]: CFR: Add min/max/step values and hex display flag for number options

[Filip Brozovic (Code Review)]

Attention is currently required from: Angel Pons, Matt DeVillier, Sean Rhodes.

Filip Brozovic has posted comments on this change by Filip Brozovic. ( https://review.coreboot.org/c/coreboot/+/86039?usp=email )

Change subject: CFR: Add min/max/step values and hex display flag for number options
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Patch Set 3:

(1 comment)

File src/commonlib/include/commonlib/cfr.h:

https://review.coreboot.org/c/coreboot/+/86039/comment/f4e9fbc1_f2fc930b?usp... :
PS2, Line 139: uint32_t min;
             : 	uint32_t max;
             : 	uint32_t step;
> Yes, though the main idea of a CFR version number is to prevent parsing incompatible data structures […]

Ack, I added a version number to the `struct lb_cfr`. On a related note, we have `struct lb_cfr_header` defined in `src/commonlib/include/commonlib/cfr.h` which doesn't seem to be used anywhere?