mb/google/dedede/var/storo: Generate SPD ID for Samsung K4U6E3S4AA-MGCR

Add supported memory parts in the mem_parts_used.txt and generate the
SPD ID for Samsung K4U6E3S4AA-MGCR.

BUG=b:211950312
TEST=emerge-dedede coreboot

Signed-off-by: Zhi Li <lizhi7@huaqin.corp-partner.google.com>
Change-Id: Ic436db8fe3ef6fb8379ec629b128c05c691ea6fe
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60337
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: zanxi chen <chenzanxi@huaqin.corp-partner.google.com>

src/mainboard/google/dedede/variants/storo/memory/Makefile.inc

@@ -4,6 +4,6 @@
 # util/spd_tools/bin/part_id_gen JSL lp4x src/mainboard/google/dedede/variants/storo/memory src/mainboard/google/dedede/variants/storo/memory/mem_parts_used.txt
 
 SPD_SOURCES =
-SPD_SOURCES += spd/lp4x/set-1/spd-1.hex      # ID = 0(0b0000)  Parts = MT53E512M32D2NP-046 WT:E, H9HCNNNBKMMLXR-NEE
+SPD_SOURCES += spd/lp4x/set-1/spd-1.hex      # ID = 0(0b0000)  Parts = MT53E512M32D2NP-046 WT:E, H9HCNNNBKMMLXR-NEE, K4U6E3S4AA-MGCR
 SPD_SOURCES += spd/lp4x/set-1/spd-4.hex      # ID = 1(0b0001)  Parts = MT53E1G32D2NP-046 WT:A
 SPD_SOURCES += spd/lp4x/set-1/spd-3.hex      # ID = 2(0b0010)  Parts = H9HCNNNCPMMLXR-NEE

src/mainboard/google/dedede/variants/storo/memory/dram_id.generated.txt

@@ -8,3 +8,4 @@ MT53E512M32D2NP-046 WT:E       0 (0000)
 H9HCNNNBKMMLXR-NEE             0 (0000)
 MT53E1G32D2NP-046 WT:A         1 (0001)
 H9HCNNNCPMMLXR-NEE             2 (0010)
+K4U6E3S4AA-MGCR                0 (0000)

src/mainboard/google/dedede/variants/storo/memory/mem_parts_used.txt

@@ -13,3 +13,4 @@ MT53E512M32D2NP-046 WT:E
 H9HCNNNBKMMLXR-NEE
 MT53E1G32D2NP-046 WT:A
 H9HCNNNCPMMLXR-NEE
+K4U6E3S4AA-MGCR