mb/google/myst: Add initial memory configuration

Generate the RAM Strap IDs based on the initial memory configuration.

BUG=b:272746814
TEST=Build Myst BIOS image.

Change-Id: I8a4fe9a41f101ac10391756f1b815220c8b98612
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74745
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Jon Murphy <jpmurphy@google.com>
Reviewed-by: Martin L Roth <gaumless@gmail.com>

src/mainboard/google/myst/variants/myst/memory/Makefile.inc

@@ -0,0 +1,7 @@
+# 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 PHX lp5 src/mainboard/google/myst/variants/myst/memory src/mainboard/google/myst/variants/myst/memory/mem_parts_used.txt
+
+SPD_SOURCES =
+SPD_SOURCES += spd/lp5/set-1/spd-2.hex      # ID = 0(0b0000)  Parts = MT62F1G32D4DR-031 WT:B, H9JCNNNCP3MLYR-N6E

src/mainboard/google/myst/variants/myst/memory/dram_id.generated.txt

@@ -0,0 +1,8 @@
+# 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 PHX lp5 src/mainboard/google/myst/variants/myst/memory src/mainboard/google/myst/variants/myst/memory/mem_parts_used.txt
+
+DRAM Part Name                 ID to assign
+MT62F1G32D4DR-031 WT:B         0 (0000)
+H9JCNNNCP3MLYR-N6E             0 (0000)

src/mainboard/google/myst/variants/myst/memory/mem_parts_used.txt

@@ -0,0 +1,2 @@
+MT62F1G32D4DR-031 WT:B,
+H9JCNNNCP3MLYR-N6E,