powerpc/fsl-booke: Update T4240 device config node in device tree

As the T4240 is based on corenet chassis v2.0 spec we update the global
utilities (GUTS) device config compatiable to reflect this.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/fsl/t4240si-post.dtsi

@@ -357,7 +357,7 @@ iommu@20000 {
 /include/ "qoriq-mpic.dtsi"
 
 	guts: global-utilities@e0000 {
-		compatible = "fsl,t4240-device-config";
+		compatible = "fsl,t4240-device-config", "fsl,qoriq-device-config-2.0";
 		reg = <0xe0000 0xe00>;
 		fsl,has-rstcr;
 		fsl,liodn-bits = <12>;