Change in coreboot[master]: nb/amd/common: Move RAM calcualtion to common code

[Michał Kopeć (Code Review)]

Attention is currently required from: Nico Huber, Michał Żygowski, Paul Menzel, Arthur Heymans.
Michał Kopeć has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/61682 )

Change subject: nb/amd/common: Move RAM calcualtion to common code
......................................................................

Patch Set 5:

(3 comments)

File src/northbridge/amd/common/ram_calc.c:

https://review.coreboot.org/c/coreboot/+/61682/comment/1c8c89f8_0427fca4 
PS5, Line 28: >
> Should this be >= ?

No, this is correct, and comment in line #25 is wrong. Updated

https://review.coreboot.org/c/coreboot/+/61682/comment/5fe7b627_f3ac4c1f 
PS5, Line 42:
> nit: double spaces.

Done

https://review.coreboot.org/c/coreboot/+/61682/comment/5d632be4_6274f1d0 
PS5, Line 50: 	*limitk += 1; /* round up last byte for northbridge resource calculation convenience */
            : 	*limitk /= KiB; /* Normalize to KiB */
> I think you need /= KiB first and then += 1.

Done