mb/google/fizz: Update OEM name list

Endeavour and Karma were missing, leading those devices to have empty
SMBIOS mainboard names. Fix by adding the missing entries.

TEST=build/boot google/fizz (endeavour), verify SMBIOS name correctly
shown via dmidecode.

Change-Id: I1d4fb2473d27ff5611f9d2b962aae2d6bf6d1da0
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80181
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/fizz/mainboard.c

@@ -187,9 +187,9 @@ const char *fizz_oem_name[] = {
 	"Wukong",
 	"Wukong",
 	"Teemo",
-	"",
+	"Karma",
 	"Jax",
-	"",
+	"Endeavour",
 	"Excelsior"
 };