mb/google/fatcat: Add support for soldered-down memory

This change adds support for soldered-down memory on the Fatcat board.
It introduces a new Kconfig option `MEMORY_SOLDERDOWN` and includes
the necessary Makefiles adjustments to handle SPD data in CBFS when
this option is enabled.

* A new Kconfig option `MEMORY_SOLDERDOWN` is added to control
soldered-down memory support.
* When `MEMORY_SOLDERDOWN` is enabled, it selects:
    * `CHROMEOS_DRAM_PART_NUMBER_IN_CBI` if `CHROMEOS` is enabled
    * `HAVE_SPD_IN_CBFS`
* The Makefile is updated to include the `variants/$(VARIANT_DIR)/
memory` subdirectory and conditionally include the `spd` subdirectory
based on `CONFIG_HAVE_SPD_IN_CBFS`.

BUG=b:348678071
TEST=Able to build google/fatcat with N-1 silicon.

Change-Id: I7edc1134630940812186118a29cbbd550f0e3634
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83828
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Ravishankar Sarawadi <ravishankar.sarawadi@intel.com>
Reviewed-by: Pranava Y N <pranavayn@google.com>

0 files changed, 0 insertions, 0 deletions