util: Add Picasso and Pollock platforms to spd_tools

PCO = Picasso
PLK = Pollock

BUG=b:162939176

Signed-off-by: Rob Barnes <robbarnes@google.com>
Change-Id: I43b74f68871062112f53fbbef8a170db53734b3e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44477
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/spd_tools/ddr4/gen_spd.go

@@ -29,10 +29,14 @@ const (
 	SPDManifestFileName = "spd_manifest.generated.txt"
 
 	PlatformTGL = 0
+	PlatformPCO = 1
+	PlatformPLK = 2
 )
 
 var platformMap = map[string]int {
 	"TGL": PlatformTGL,
+	"PCO": PlatformPCO,
+	"PLK": PlatformPLK,
 }
 
 var currPlatform int