[XS] Change in coreboot[main]: drivers/intel/fsp2_0: Use coreboot uint8_t type for consistency

[Paul Menzel (Code Review)]

Attention is currently required from: Andrey Petrov, Ronak Kanabar, Subrata Banik.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81571?usp=email )

Change subject: drivers/intel/fsp2_0: Use coreboot uint8_t type for consistency
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Patch Set 1: Code-Review+1