util/spd_tools/part_id_gen: Support Sabrina SoC

Add support to generate DRAM part ID for boards using Sabrina SoC.

BUG=None
TEST=Generate DRAM part ID for Skyrim mainboard.

Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Change-Id: Ica57b12239019831f7bf93982be3c93b7f8b6986
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63597
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Robert Zieba <robertzieba@google.com>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

util/spd_tools/src/part_id_gen/part_id_gen.go

@@ -40,6 +40,7 @@ var supportedPlatforms = [...]string{
 	"JSL",
 	"PCO",
 	"CZN",
+	"SBR",
 }
 
 var supportedMemTechs = [...]string{