[L] Change in coreboot[master]: soc/amd/genoa: Add Kconfig/Makefile to generate PSP image

[Arthur Heymans (Code Review)]

Attention is currently required from: Marshall Dawson, Varshit Pandya.

Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/76498?usp=email )

Change subject: soc/amd/genoa: Add Kconfig/Makefile to generate PSP image
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Patch Set 4:

(1 comment)

File src/soc/amd/genoa/Kconfig:

https://review.coreboot.org/c/coreboot/+/76498/comment/71529714_3353235d :
PS4, Line 75: config AMD_FWM_POSITION_INDEX
            : 	default 5
> With no prompt, this won't be choosable by the developer via menuconfig.

From 57299: "Family 19h Models 10h–1Fh EFS search order supports only one EFS offset, at 0x20000, in the respective 16 Mbyte page (four pages in the 64 MByte SPIROM)."

Not making this configurable is intentional.