Change in coreboot[master]: amdfwtool: Add more detailed description and note in comment

[Paul Menzel (Code Review)]

Attention is currently required from: Bao Zheng, Marshall Dawson, Zheng Bao.
Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55602 )

Change subject: amdfwtool: Add more detailed description and note in comment
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Patch Set 11:

(6 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/55602/comment/4dfaee5a_fa238e77 
PS11, Line 7: Add more detailed description and note in comment
Maybe:
> Update and extend PSP header format description

https://review.coreboot.org/c/coreboot/+/55602/comment/e5819d5a_689a544b 
PS11, Line 8: 
Why is the update needed? Was newer documentation released?

File util/amdfwtool/amdfwtool.c:

https://review.coreboot.org/c/coreboot/+/55602/comment/cc5645d7_39da404e 
PS11, Line 4: (*)
What does this mean?

https://review.coreboot.org/c/coreboot/+/55602/comment/46e94746_7207288c 
PS11, Line 31: Firmwares
I think plural is also *firmware*.

https://review.coreboot.org/c/coreboot/+/55602/comment/eaa5eb05_625799da 
PS11, Line 49: Firmwares
Firmware

https://review.coreboot.org/c/coreboot/+/55602/comment/211ecb64_62a663d0 
PS11, Line 53: BIOS Directory Table(BDT)
Please add a space before the (.