brya: add new zydron variant

Add a new zydron variant, which is a variant of brya's skolas
baseboard. currently copy the variant file from kano.

BUG=b:250787251
TEST=build pass

Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Change-Id: I49a41678568daef80b7cd1e3ed60ce4763034f9e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68130
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: YH Lin <yueherngl@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig
index c1acc37..dbf6a02 100644
--- a/src/mainboard/google/brya/Kconfig
+++ b/src/mainboard/google/brya/Kconfig
@@ -144,6 +144,7 @@
 	default 0x0 if BOARD_GOOGLE_PUJJO
 	default 0x0 if BOARD_GOOGLE_XIVU
 	default 0x0 if BOARD_GOOGLE_YAVIKS
+	default 0x1 if BOARD_GOOGLE_ZYDRON
 
 config DRIVER_TPM_I2C_ADDR
 	hex
@@ -210,6 +211,7 @@
 	default "Gaelin4ADL" if BOARD_GOOGLE_GAELIN4ADL
 	default "Yaviks" if BOARD_GOOGLE_YAVIKS
 	default "Lisbon" if BOARD_GOOGLE_LISBON
+	default "Zydron" if BOARD_GOOGLE_ZYDRON
 
 config VARIANT_DIR
 	default "brya0" if BOARD_GOOGLE_BRYA0
@@ -248,6 +250,7 @@
 	default "gaelin" if BOARD_GOOGLE_GAELIN4ADL
 	default "yaviks" if BOARD_GOOGLE_YAVIKS
 	default "lisbon" if BOARD_GOOGLE_LISBON
+	default "zydron" if BOARD_GOOGLE_ZYDRON
 
 config VBOOT
 	select VBOOT_EARLY_EC_SYNC if !BOARD_GOOGLE_BASEBOARD_NISSA
@@ -282,7 +285,7 @@
 
 choice
 	prompt "Cache as RAM (CAR) setup configuration to use"
-	default USE_ADL_NEM if BOARD_GOOGLE_PRIMUS4ES || BOARD_GOOGLE_GIMBLE4ES || BOARD_GOOGLE_REDRIX4ES || BOARD_GOOGLE_TAEKO4ES || BOARD_GOOGLE_ANAHERA4ES || BOARD_GOOGLE_TANIKS || BOARD_GOOGLE_NIVVIKS || BOARD_GOOGLE_NEREID || BOARD_GOOGLE_CRAASK || BOARD_GOOGLE_SKOLAS || BOARD_GOOGLE_SKOLAS4ES || BOARD_GOOGLE_JOXER || BOARD_GOOGLE_PUJJO || BOARD_GOOGLE_XIVU || BOARD_GOOGLE_YAVIKS
+	default USE_ADL_NEM if BOARD_GOOGLE_PRIMUS4ES || BOARD_GOOGLE_GIMBLE4ES || BOARD_GOOGLE_REDRIX4ES || BOARD_GOOGLE_TAEKO4ES || BOARD_GOOGLE_ANAHERA4ES || BOARD_GOOGLE_TANIKS || BOARD_GOOGLE_NIVVIKS || BOARD_GOOGLE_NEREID || BOARD_GOOGLE_CRAASK || BOARD_GOOGLE_SKOLAS || BOARD_GOOGLE_SKOLAS4ES || BOARD_GOOGLE_JOXER || BOARD_GOOGLE_PUJJO || BOARD_GOOGLE_XIVU || BOARD_GOOGLE_YAVIKS || BOARD_GOOGLE_ZYDRON
 	default USE_ADL_ENEM
 
 config USE_ADL_ENEM