[M] Change in coreboot[master]: soc/amd/morgana: Add 32M support

[Fred Reitberger (Code Review)]

Attention is currently required from: Bao Zheng, Jason Glenesk, Marshall Dawson, Matt DeVillier, Zheng Bao, Martin Roth, Felix Held.

Fred Reitberger has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69150 )

Change subject: soc/amd/morgana: Add 32M support
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Patch Set 1:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/69150/comment/c6042f91_337ffbe4 
PS1, Line 24: If coreboot need to access bottom 16M, which in fact doesn't seem to
> 'implimented' may be misspelled - perhaps 'implemented'?

Please fix.

https://review.coreboot.org/c/coreboot/+/69150/comment/612dacf0_77c669df 
PS1, Line 27: The bit 15 of soft fuse decides which (top or bottom) 16M is mapped to
should this be bit 14?

File src/soc/amd/morgana/Makefile.inc:

https://review.coreboot.org/c/coreboot/+/69150/comment/cd235266_0d528560 
PS1, Line 118: PSP_SOFTFUSE_BITS += 15
should this be bit 14?