[L] Change in coreboot[master]: soc/amd: Define AMD_FWM_POSITION config item

[Arthur Heymans (Code Review)]

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

Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68584 )

Change subject: soc/amd: Define AMD_FWM_POSITION config item
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Patch Set 4:

(1 comment)

File src/soc/amd/common/block/psp/Kconfig:

https://review.coreboot.org/c/coreboot/+/68584/comment/9f9ef98c_9b5bfac3 
PS4, Line 87: default 0xFFFA0000 if AMD_FWM_POSITION_INDEX = 0
            : 	default 0xFFF20000 if AMD_FWM_POSITION_INDEX = 1
            : 	default 0xFFE20000 if AMD_FWM_POSITION_INDEX = 2
            : 	default 0xFFC20000 if AMD_FWM_POSITION_INDEX = 3
            : 	default 0xFF820000 if AMD_FWM_POSITION_INDEX = 4
            : 	default 0xFF020000 if AMD_FWM_POSITION_INDEX = 5
This needs to be an offset in flash, not in x86 memory mapped space?