Change in coreboot[master]: util: Add amdfwread utility

[Rob Barnes (Code Review)]

Attention is currently required from: Bao Zheng, Robert Zieba, Raul Rangel, Marshall Dawson, Karthik Ramasubramanian.
Rob Barnes has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62795 )

Change subject: util: Add amdfwread utility
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Patch Set 5:

(2 comments)

File util/amdfwread/amdfwread.c:

https://review.coreboot.org/c/coreboot/+/62795/comment/d6af86b5_ebc2bc7e 
PS5, Line 13: typedef enum _amd_fw_type {
Why not include amdfwtool.h for the common enums and structs?

File util/amdfwread/description.md:

https://review.coreboot.org/c/coreboot/+/62795/comment/84dbffd2_3090b1e3 
PS5, Line 1: Read information from AMD Firmware combination `C`
I know amdfwtool lacks any documentation, but we shouldn't continue this pattern here. It'd be good to include a more detailed description and a usage guide (maybe usage belongs in readme.md).