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/intel/kblrvp/variants/rvp3/overridetree.cb b/src/mainboard/intel/kblrvp/variants/rvp3/overridetree.cb
index 81557eb..0af8282 100644
--- a/src/mainboard/intel/kblrvp/variants/rvp3/overridetree.cb
+++ b/src/mainboard/intel/kblrvp/variants/rvp3/overridetree.cb
@@ -3,9 +3,6 @@
 	# GPE configuration
 	register "gpe0_dw0" = "GPP_C"
 
-	# EC host command ranges are in 0x800-0x8ff & 0x200-0x20f
-	register "gen2_dec" = "0x000c0201"
-
 	# FSP Configuration
 	register "DspEnable" = "1"
 
@@ -123,6 +120,9 @@
 		device ref pcie_rp9	on  end # x1 WLAN
 		device ref pcie_rp10	on  end # x1 WIGIG
 		device ref lpc_espi	on
+			# EC host command ranges are in 0x800-0x8ff & 0x200-0x20f
+			register "gen2_dec" = "0x000c0201"
+
 			chip drivers/pc80/tpm
 				device pnp 0c31.0 on end
 			end