mb/google/nissa/var/gothrax: Generate RAM IDs for new memory parts

Add the support RAM parts for gothrax.
Here is the ram part number list:
DRAM Part Name                 ID to assign
MT62F512M32D2DR-031 WT:B       0 (0000)
H58G56AK6BX069                 1 (0001)
K3LKBKB0BM-MGCP                2 (0010)

BUG=b:284388714
BRANCH=None
TEST=emerge-nissa coreboot

Signed-off-by: Yunlong Jia <yunlong.jia@ecs.corp-partner.google.com>
Change-Id: Ib16846f7b2061ee254db674ac7bac66c9b9f4e70
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75834
Reviewed-by: Henry Sun <henrysun@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kangheui Won <khwon@chromium.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/mainboard/google/brya/variants/gothrax/memory/Makefile.inc

@@ -1,5 +1,9 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 # This is an auto-generated file. Do not edit!!
-# Add memory parts in mem_parts_used.txt and run spd_tools to regenerate.
+# Generated by:
+# ./util/spd_tools/bin/part_id_gen ADL lp5 src/mainboard/google/brya/variants/gothrax/memory src/mainboard/google/brya/variants/gothrax/memory/mem_parts_used.txt
 
-SPD_SOURCES = placeholder
+SPD_SOURCES =
+SPD_SOURCES += spd/lp5/set-0/spd-1.hex      # ID = 0(0b0000)  Parts = MT62F512M32D2DR-031 WT:B
+SPD_SOURCES += spd/lp5/set-0/spd-3.hex      # ID = 1(0b0001)  Parts = H58G56AK6BX069
+SPD_SOURCES += spd/lp5/set-0/spd-3.hex      # ID = 2(0b0010)  Parts = K3LKBKB0BM-MGCP

src/mainboard/google/brya/variants/gothrax/memory/dram_id.generated.txt

@@ -1 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# This is an auto-generated file. Do not edit!!
+# Generated by:
+# ./util/spd_tools/bin/part_id_gen ADL lp5 src/mainboard/google/brya/variants/gothrax/memory src/mainboard/google/brya/variants/gothrax/memory/mem_parts_used.txt
+
 DRAM Part Name                 ID to assign
+MT62F512M32D2DR-031 WT:B       0 (0000)
+H58G56AK6BX069                 1 (0001)
+K3LKBKB0BM-MGCP                2 (0010)

src/mainboard/google/brya/variants/gothrax/memory/mem_parts_used.txt

@@ -9,3 +9,7 @@
 # See util/spd_tools/README.md for more details and instructions.
 
 # Part Name
+
+MT62F512M32D2DR-031 WT:B,
+H58G56AK6BX069,*1
+K3LKBKB0BM-MGCP,