[M] Change in coreboot[master]: soc/amd/common/psp_verstage: Map/unmap boot device on need basis

[Raul Rangel (Code Review)]

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

Raul Rangel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74606 )

Change subject: soc/amd/common/psp_verstage: Map/unmap boot device on need basis
......................................................................

Patch Set 1:

(3 comments)

File src/soc/amd/common/psp_verstage/boot_dev.c:

https://review.coreboot.org/c/coreboot/+/74606/comment/673b683e_520045b3 
PS1, Line 22: svc_map_spi_rom
Will this set mapping to NULL on failure?

https://review.coreboot.org/c/coreboot/+/74606/comment/263c1f1f_11a2db88 
PS1, Line 22: size
Does this have any alignment restrictions?

File src/soc/amd/common/psp_verstage/fch.c:

https://review.coreboot.org/c/coreboot/+/74606/comment/30935194_740276b1 
PS1, Line 100: SpiBiosSmnBase
Is this really a `void *`?