Change in coreboot[master]: src/lib: Add CBMEM tag id to parse ddr information

[Arthur Heymans (Code Review)]

Attention is currently required from: Ravi kumar, Shelley Chen, mturney mturney, Julius Werner.
Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59194 )

Change subject: src/lib: Add CBMEM tag id to parse ddr information
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Patch Set 5:

(1 comment)

File src/commonlib/include/commonlib/cbmem_id.h:

https://review.coreboot.org/c/coreboot/+/59194/comment/128eaf27_1f91c6a7 
PS5, Line 82: 0x10
> They're not actually random, they're meant to be readable in a hexdump. So this one could be something like 0x5048434D ('MCHP').

Oh... I always used a random number... It would be good to document this (outside the scope of this CL ofc).