Change in coreboot[master]: amdfwtool: Set the region_type as 0 for entry "BIOS level 2"

[Marshall Dawson (Code Review)]

Attention is currently required from: Bao Zheng, Raul Rangel, Paul Menzel, Zheng Bao.
Marshall Dawson has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/54871 )

Change subject: amdfwtool: Set the region_type as 0 for entry "BIOS level 2"
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Patch Set 2: -Code-Review

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/54871/comment/e770a758_d4243f44 
PS2, Line 9: But we need to set it explicitly as
           : a known value.
> Thanks, though that’s unfortunate. […]

Or it's correcting an oversight first introduced in CB:33400, we're doing it for consistency, etc.

Also, the spec is NDA so you can cite the number but clarify that an NDA is required.  You could also point to https://doc.coreboot.org/soc/amd/psp_integration.html, however.