skl mainboards/dt: Move serirq setting into LPC device scope

Change-Id: I84da5365907664ce223dec4adb22a8f1a6e2a144
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83188
Reviewed-by: Jonathon Hall <jonathon.hall@puri.sm>
Reviewed-by: Marvin Evers <marvin.n.evers@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Erik van den Bogaert <ebogaert@eltan.com>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
diff --git a/src/mainboard/intel/kblrvp/variants/rvp8/overridetree.cb b/src/mainboard/intel/kblrvp/variants/rvp8/overridetree.cb
index 5516fee..010312c 100644
--- a/src/mainboard/intel/kblrvp/variants/rvp8/overridetree.cb
+++ b/src/mainboard/intel/kblrvp/variants/rvp8/overridetree.cb
@@ -7,8 +7,6 @@
 	# FSP Configuration
 	register "ScsEmmcHs400Enabled" = "0"
 
-	register "serirq_mode" = "SERIRQ_CONTINUOUS"
-
 	# VR Settings Configuration for 5 Domains
 	#+----------------+-------+-------+-------------+-------------+-------+
 	#| Domain/Setting |  SA   |  IA   | Ring Sliced | GT Unsliced |  GT   |
@@ -173,6 +171,8 @@
 		device ref emmc		off end
 		device ref sdxc		off end
 		device ref lpc_espi	on
+			register "serirq_mode" = "SERIRQ_CONTINUOUS"
+
 			#chip drivers/pc80/tpm
 			#	device pnp 0c31.0 on end
 			#end