sandbox: Enable the mouse

Provide a devicetree fragment to enable a mouse for sandbox.

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

arch/sandbox/dts/sandbox.dtsi

@@ -203,6 +203,10 @@
 		};
 	};
 
+	mouse {
+		compatible = "sandbox,mouse";
+	};
+
 	pci@0 {
 		pci@1e,0 {
 			compatible = "sandbox,pmc";

arch/sandbox/dts/test.dts

@@ -591,6 +591,10 @@
 		test5-gpios = <&gpio_a 19>;
 	};
 
+	mouse {
+		compatible = "sandbox,mouse";
+	};
+
 	mmio-bus@0 {
 		#address-cells = <1>;
 		#size-cells = <1>;