Change in coreboot[master]: soc/amd/common/block/psp: add PSP command

[Felix Held (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Marshall Dawson, Name of user not set #1004133, Al Hirani, Rob Barnes, Fred Reitberger.
Felix Held has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/61462 )

Change subject: soc/amd/common/block/psp: add PSP command
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Patch Set 4:

(3 comments)

File src/soc/amd/common/block/psp/psp.c:

PS4: 
this is psp gen 2 specific, so it needs to be moved to psp_gen2.c

File src/soc/amd/common/block/psp/psp_def.h:

https://review.coreboot.org/c/coreboot/+/61462/comment/07227d85_3152a89a 
PS4, Line 21: #define MBOX_BIOS_CMD_SET_SPL_FUSE		0x2d
            : #define MBOX_BIOS_CMD_QUERY_SPL_FUSE		0x47
those two should be above MBOX_BIOS_CMD_ABORT so that those are in ascending order

https://review.coreboot.org/c/coreboot/+/61462/comment/53c7a4f5_9aa2e0ce 
PS4, Line 29: 10998
should this be 0x10998?