amd/soc/common: Remove cbmem subregions in heap

Revert most of 4f3f47b "amd/common: Define regions in cbmem".  This
puts the management of the heap space back to its traditional
methodology.  Subsequent patches that were to have used these
subregions have been reworked.

BUG=b:69614064

Change-Id: Ib3d40bcf61c50dbc481b60e7b5286f65a529b912
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/23516
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
3 files changed