skl mainboards/dt: Move usb{2,3}_ports settings into XHCI device scope

Change-Id: I22ba991a9d559b0ecc7b3ceddcfd099890dd6c3a
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83171
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Marvin Evers <marvin.n.evers@gmail.com>
Reviewed-by: Erik van den Bogaert <ebogaert@eltan.com>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Jonathon Hall <jonathon.hall@puri.sm>
diff --git a/src/mainboard/facebook/monolith/devicetree.cb b/src/mainboard/facebook/monolith/devicetree.cb
index 4bc61dd..609e181 100644
--- a/src/mainboard/facebook/monolith/devicetree.cb
+++ b/src/mainboard/facebook/monolith/devicetree.cb
@@ -174,21 +174,6 @@
 	# Disable Aspm
 	register "pcie_rp_aspm[8]" = "AspmDisabled"
 
-	register "usb2_ports" = "{
-		[0] = USB2_PORT_TYPE_C(OC_SKIP),	/* USB-C Port 2 */
-		[1] = USB2_PORT_MID(OC1),		/* USB3_TYPE-A Port 1 */
-		[2] = USB2_PORT_MID(OC1),		/* USB3_TYPE-A Port 2 */
-		[3] = USB2_PORT_TYPE_C(OC_SKIP),	/* USB-C Port 1 */
-		[4] = USB2_PORT_SHORT(OC_SKIP),		/* M2 Port */
-		[6] = USB2_PORT_SHORT(OC_SKIP),		/* Audio board */
-	}"
-
-	register "usb3_ports" = "{
-		[0] = USB3_PORT_DEFAULT(OC_SKIP),	/* USB-C Port 2 */
-		[1] = USB3_PORT_DEFAULT(OC_SKIP),	/* USB3_TYPE-A Port 1 */
-		[2] = USB3_PORT_DEFAULT(OC_SKIP),	/* USB3_TYPE-A Port 2 */
-		[3] = USB3_PORT_DEFAULT(OC_SKIP),	/* USB-C Port 1 */
-	}"
 
 	# Must leave UART0 enabled or SD/eMMC will not work as PCI
 	register "SerialIoDevMode" = "{
@@ -209,7 +194,23 @@
 		device ref igpu		on  end
 		device ref sa_thermal	on  end
 		device ref gmm		on  end
-		device ref south_xhci	on  end
+		device ref south_xhci	on
+			register "usb2_ports" = "{
+				[0] = USB2_PORT_TYPE_C(OC_SKIP),	/* USB-C Port 2 */
+				[1] = USB2_PORT_MID(OC1),		/* USB3_TYPE-A Port 1 */
+				[2] = USB2_PORT_MID(OC1),		/* USB3_TYPE-A Port 2 */
+				[3] = USB2_PORT_TYPE_C(OC_SKIP),	/* USB-C Port 1 */
+				[4] = USB2_PORT_SHORT(OC_SKIP),		/* M2 Port */
+				[6] = USB2_PORT_SHORT(OC_SKIP),		/* Audio board */
+			}"
+
+			register "usb3_ports" = "{
+				[0] = USB3_PORT_DEFAULT(OC_SKIP),	/* USB-C Port 2 */
+				[1] = USB3_PORT_DEFAULT(OC_SKIP),	/* USB3_TYPE-A Port 1 */
+				[2] = USB3_PORT_DEFAULT(OC_SKIP),	/* USB3_TYPE-A Port 2 */
+				[3] = USB3_PORT_DEFAULT(OC_SKIP),	/* USB-C Port 1 */
+			}"
+		end
 		device ref south_xdci	on  end
 		device ref thermal	on  end
 		device ref heci1	on  end