mb/google/zork: Split devicetree between baseboards

Split zork baseboard devicetree between dalboz and trembyle.
The devicetree is simply duplicated, no other changes in this commit.

BUG=b:158096224
TEST=Build coreboot for zork

Signed-off-by: Rob Barnes <robbarnes@google.com>
Change-Id: I5b26770790092c69db9567fa4337edd21a6ed809
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42741
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/mainboard/google/zork/Kconfig b/src/mainboard/google/zork/Kconfig
index 891f2b8..9740d63 100644
--- a/src/mainboard/google/zork/Kconfig
+++ b/src/mainboard/google/zork/Kconfig
@@ -81,7 +81,8 @@
 
 config DEVICETREE
 	string
-	default "variants/baseboard/devicetree.cb"
+	default "variants/baseboard/devicetree_trembyle.cb" if BOARD_GOOGLE_BASEBOARD_TREMBYLE
+	default "variants/baseboard/devicetree_dalboz.cb" if BOARD_GOOGLE_BASEBOARD_DALBOZ
 
 config OVERRIDE_DEVICETREE
 	string
diff --git a/src/mainboard/google/zork/variants/baseboard/devicetree.cb b/src/mainboard/google/zork/variants/baseboard/devicetree_dalboz.cb
similarity index 100%
copy from src/mainboard/google/zork/variants/baseboard/devicetree.cb
copy to src/mainboard/google/zork/variants/baseboard/devicetree_dalboz.cb
diff --git a/src/mainboard/google/zork/variants/baseboard/devicetree.cb b/src/mainboard/google/zork/variants/baseboard/devicetree_trembyle.cb
similarity index 100%
rename from src/mainboard/google/zork/variants/baseboard/devicetree.cb
rename to src/mainboard/google/zork/variants/baseboard/devicetree_trembyle.cb