x86: dts: Add LPC settings for link

Add some settings required to set up the LPC correctly.

Signed-off-by: Simon Glass <sjg@chromium.org>

arch/x86/dts/link.dts

@@ -169,6 +169,14 @@
 			#address-cells = <1>;
 			#size-cells = <1>;
 			gen-dec = <0x800 0xfc 0x900 0xfc>;
+			intel,gen-dec = <0x800 0xfc 0x900 0xfc>;
+			intel,pirq-routing = <0x8b 0x8a 0x8b 0x8b
+						0x80 0x80 0x80 0x80>;
+			intel,gpi-routing = <0 0 0 0 0 0 0 2
+						1 0 0 0 0 0 0 0>;
+			/* Enable EC SMI source */
+			intel,alt-gp-smi-enable = <0x0100>;
+
 			cros-ec@200 {
 				compatible = "google,cros-ec";
 				reg = <0x204 1 0x200 1 0x880 0x80>;