mb/google/rex: Use name 'LCD0' for internal panel output

The GMA driver generates the brightness controls expecting the name
LCD0, so we need to use it here as well so that the DSDT and SSDT parts
match.

Change-Id: Id93cfea93edfefc8237b53214734531b811b36e4
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80202
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/rex/variants/karis/overridetree.cb b/src/mainboard/google/rex/variants/karis/overridetree.cb
index 6cf286b..c74b51c 100644
--- a/src/mainboard/google/rex/variants/karis/overridetree.cb
+++ b/src/mainboard/google/rex/variants/karis/overridetree.cb
@@ -129,7 +129,7 @@
 			chip drivers/gfx/generic
 				register "device_count" = "6"
 				# DDIA for eDP
-				register "device[0].name" = ""LCD""
+				register "device[0].name" = ""LCD0""
 				register "device[0].type" = "panel"
 				# DDIB for HDMI
 				register "device[1].name" = ""DD01""
diff --git a/src/mainboard/google/rex/variants/rex0/overridetree.cb b/src/mainboard/google/rex/variants/rex0/overridetree.cb
index 46f86f1..12068ce 100644
--- a/src/mainboard/google/rex/variants/rex0/overridetree.cb
+++ b/src/mainboard/google/rex/variants/rex0/overridetree.cb
@@ -154,7 +154,7 @@
 			chip drivers/gfx/generic
 				register "device_count" = "6"
 				# DDIA for eDP
-				register "device[0].name" = ""LCD""
+				register "device[0].name" = ""LCD0""
 				register "device[0].type" = "panel"
 				# DDIB for HDMI
 				# If HDMI is not enumerated in the kernel, then no GFX device should be added for DDIB