Change in coreboot[master]: lib: set up specific purpose memory as LB_MEM_SOFT_RESERVED

[Julius Werner (Code Review)]

Attention is currently required from: Marc Jones, Nico Huber, Jonathan Zhang, Philipp Deppenwiese, Tim Wawrzynczak, Angel Pons, Subrata Banik, Aaron Durbin, Patrick Rudolph, Peter Tsung Ho Wu, Ron Minnich.
Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52585 )

Change subject: lib: set up specific purpose memory as LB_MEM_SOFT_RESERVED
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Patch Set 2:

(1 comment)

File src/include/bootmem.h:

https://review.coreboot.org/c/coreboot/+/52585/comment/21fdf608_5cadc3eb 
PS2, Line 32: 	BM_MEM_OS_CUTOFF = BM_MEM_TABLE,
Careful here! You should insert your new line above BM_MEM_TABLE so the cutoff will still be where it's supposed to. (Right now, I don't think your patch would work because memory types after the cutoff are not written to the coreboot table. Did you test it?)