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

[Julius Werner (Code Review)]

Attention is currently required from: Ravi kumar, Shelley Chen, mturney mturney, Arthur Heymans.
Julius Werner 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
......................................................................

Patch Set 5:

(1 comment)

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

https://review.coreboot.org/c/coreboot/+/59194/comment/2dee98b5_3ea2eaf0 
PS5, Line 82: 0x10
> > They're not actually random, they're meant to be readable in a hexdump. […]

Well, it's an emergent pattern more than a rule... I think at first it was supposed to be a random number but then people try being cheeky and pick something with a meaning behind it, and eventually everyone does. But yeah I agree it could be standardized... in fact it would be good if we had a macro like MAGIC_LE32('M', 'C', 'H', 'P') that translates into a little-endian integer, and rewrote all these source files in a more readable way.