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

[Bao Zheng (Code Review)]

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

Bao Zheng 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 2:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/69150/comment/eab72aeb_bb8393ac 
PS1, Line 24: If coreboot need to access bottom 16M, which in fact doesn't seem to
> > 'implimented' may be misspelled - perhaps 'implemented'? […]

Done

https://review.coreboot.org/c/coreboot/+/69150/comment/badc5cbb_654bcd9b 
PS1, Line 27: The bit 15 of soft fuse decides which (top or bottom) 16M is mapped to
> should this be bit 14?

Done

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

https://review.coreboot.org/c/coreboot/+/69150/comment/dc4c6eae_d04f2885 
PS1, Line 118: PSP_SOFTFUSE_BITS += 15
> should this be bit 14?

Done