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

[Jason Glenesk (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Marshall Dawson, Name of user not set #1004133, Al Hirani, Avinash Alevoor, Rob Barnes, Fred Reitberger, Felix Held.
Jason Glenesk 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 11:

(3 comments)

File src/soc/amd/common/block/psp/psp_gen2.c:

https://review.coreboot.org/c/coreboot/+/61462/comment/cd7d82a8_02a01ec3 
PS8, Line 125: u32 soc_read_c2p38(void)
> since all bit combinations might be valid here, the return value can't be used for both success/erro […]

Done

https://review.coreboot.org/c/coreboot/+/61462/comment/2ef441b9_604d9c65 
PS8, Line 147: 	if (soc_read_c2p38() & CORE_2_PSP_MSG_38_FUSE_SPL) {
> this condition is also true in the error case of the soc_read_c2p38 call

Done

https://review.coreboot.org/c/coreboot/+/61462/comment/f33f05cd_92430daf 
PS8, Line 152: 		printk(BIOS_DEBUG, "PSP: Fuse SPL not requested\n");
> this needs to be put in curly brackets, since the code in the corresponding if statement is in curly […]

Done