soc/amd/picasso/mca: fix core MCA bank names

The bank names were copied over from Stoneyridge, but they don't match
for Picasso.

TEST=Checked the Picasso PPR.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ia86cf3874f8b16b007bad46535af6dafb776fbdd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51476
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/picasso/mca.c

@@ -136,11 +136,12 @@ failed:
 static const char *const mca_bank_name[] = {
 	"Load-store unit",
 	"Instruction fetch unit",
-	"Combined unit",
-	"Reserved",
-	"Northbridge",
+	"L2 cache unit",
+	"Decode unit"
+	"",
 	"Execution unit",
-	"Floating point unit"
+	"Floating point unit",
+	"L3 cache unit"
 };
 
 /* Check the Legacy Machine Check Architecture registers */