[M] Change in coreboot[main]: mb/amd/birman: Add Birmanplus board support for PHX1 SOC

[Felix Held (Code Review)]

Attention is currently required from: Anand Vaikar, Fred Reitberger, Jason Glenesk.

Felix Held has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/80353?usp=email )

Change subject: mb/amd/birman: Add Birmanplus board support for PHX1 SOC
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Patch Set 2:

(3 comments)

Patchset:

PS2: 
did you verify that the soc's gpio configuration in gpio.c and the ec's gpio configuration in ec.c are also valid for birmanplus?

File src/mainboard/amd/birman/Kconfig:

https://review.coreboot.org/c/coreboot/+/80353/comment/7bdad66c_8568cb0a :
PS2, Line 78: 	default "3rdparty/blobs/mainboard/amd/birman/EC_birman.bin"
do birman and birmanplus share the same ec firmware?

File src/mainboard/amd/birman/variants/birmanplus/port_descriptors.c:

https://review.coreboot.org/c/coreboot/+/80353/comment/2a01a5bf_7e91d9e4 :
PS2, Line 17: 	
in a few lines the '' in these defines aren't aligned; would be good to make sure that those are all aligned