Change in coreboot[master]: amdfwtool: Add support for AMD's BIOS A/B recovery feature

[Bao Zheng (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Martin Roth, Marshall Dawson, Zheng Bao, Felix Held.
Bao Zheng has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/56773 )

Change subject: amdfwtool: Add support for AMD's BIOS A/B recovery feature
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Patch Set 25:

(2 comments)

File util/amdfwtool/amdfwtool.h:

https://review.coreboot.org/c/coreboot/+/56773/comment/62708a68_30b5d8c0 
PS22, Line 191: #define BDT_LVL1_AB 0x4
> Done

https://review.coreboot.org/c/coreboot/+/58765

File util/amdfwtool/amdfwtool.c:

https://review.coreboot.org/c/coreboot/+/56773/comment/69e28377_9eb8b0b2 
PS22, Line 634: 	count = pspdir->header.num_entries;
> Done

https://review.coreboot.org/c/coreboot/+/58764