mb/google/rex/var/karis: Add TPM support

BUG=b:294155897
TEST=emerge-rex coreboot

Change-Id: I4076ee4a16b7260db464760d5a19e1144081bab8
Signed-off-by: Tyler Wang <tyler.wang@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77181
Reviewed-by: Eran Mitrani <mitrani@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/rex/Kconfig b/src/mainboard/google/rex/Kconfig
index 25155e4..bb9f2b5 100644
--- a/src/mainboard/google/rex/Kconfig
+++ b/src/mainboard/google/rex/Kconfig
@@ -162,7 +162,7 @@
 
 config DRIVER_TPM_I2C_BUS
 	hex
-	default 0x4 if BOARD_GOOGLE_MODEL_REX || BOARD_GOOGLE_MODEL_SCREEBO || BOARD_GOOGLE_MODEL_OVIS
+	default 0x4 if BOARD_GOOGLE_MODEL_REX || BOARD_GOOGLE_MODEL_SCREEBO || BOARD_GOOGLE_MODEL_OVIS || BOARD_GOOGLE_MODEL_KARIS
 
 config DRIVER_TPM_I2C_ADDR
 	hex