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/rvp11/overridetree.cb b/src/mainboard/intel/kblrvp/variants/rvp11/overridetree.cb
index 49edccb..8a3161a 100644
--- a/src/mainboard/intel/kblrvp/variants/rvp11/overridetree.cb
+++ b/src/mainboard/intel/kblrvp/variants/rvp11/overridetree.cb
@@ -4,8 +4,6 @@
 	register "DspEnable" = "0"
 	register "ScsEmmcHs400Enabled" = "0"
 
-	register "serirq_mode" = "SERIRQ_CONTINUOUS"
-
 	# Enable PCIE slot
 	register "PcieRpEnable[5]" = "1"
 	register "PcieRpClkReqSupport[5]" = "1"
@@ -119,5 +117,8 @@
 		device ref sdxc		off end
 		device ref hda		on  end
 		device ref gbe		on  end
+		device ref lpc_espi on
+			register "serirq_mode" = "SERIRQ_CONTINUOUS"
+		end
 	end
 end