[S] Change in coreboot[master]: include/cper.h: Add CPER Memory Error Section definitions

[Arthur Heymans (Code Review)]

Attention is currently required from: Johnny Lin, Angel Pons, Shuming Chu (Shuming), Tim Chu.

Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69198 )

Change subject: include/cper.h: Add CPER Memory Error Section definitions
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Patch Set 3: Code-Review-1

(2 comments)

File src/include/cper.h:

https://review.coreboot.org/c/coreboot/+/69198/comment/8b5b143b_ae3e3646 
PS3, Line 400: 	enum cper_err_code mem_err_type;
> Will this work properly? Not sure if the size of enum types is well-defined.

It won't. This needs to be u8 according to the spec. sizeof(enum) == sizeof(int).

https://review.coreboot.org/c/coreboot/+/69198/comment/6aefb1af_fa959efd 
PS3, Line 405: __packed
This is not needed. All entries seem aligned.