skl mainboards/dt: Move genx_dec settings into LPC device scope

Change-Id: Iecb4851bedb7c9ed7793763d80acbcbb068e8832
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83172
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Jonathon Hall <jonathon.hall@puri.sm>
Reviewed-by: Erik van den Bogaert <ebogaert@eltan.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Marvin Evers <marvin.n.evers@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/protectli/vault_kbl/devicetree.cb b/src/mainboard/protectli/vault_kbl/devicetree.cb
index 6148196..0b5d0cd 100644
--- a/src/mainboard/protectli/vault_kbl/devicetree.cb
+++ b/src/mainboard/protectli/vault_kbl/devicetree.cb
@@ -12,11 +12,6 @@
 	register "gpe0_dw1" = "GPP_D"
 	register "gpe0_dw2" = "GPP_E"
 
-	register "gen1_dec" = "0x00fc0201"
-	register "gen2_dec" = "0x007c0a01"
-	register "gen3_dec" = "0x000c03e1"
-	register "gen4_dec" = "0x001c02e1"
-
 	register "eist_enable" = "1"
 
 	# Disable DPTF
@@ -202,6 +197,10 @@
 				"SlotLengthShort" "WIFI1" "SlotDataBusWidth1X"
 		end
 		device ref lpc_espi	on
+			register "gen1_dec" = "0x00fc0201"
+			register "gen2_dec" = "0x007c0a01"
+			register "gen3_dec" = "0x000c03e1"
+			register "gen4_dec" = "0x001c02e1"
 			chip superio/ite/it8772f
 				register "TMPIN1.mode" = "THERMAL_RESISTOR"
 				register "TMPIN2.mode" = "THERMAL_RESISTOR"