[POWERPC] 4xx: Rename CPU nodes to avoid dtc incompatibility

Recent DTC versions disallow certain special characters in full paths without
being quoted with {}.  That however breaks compatibility with older DTC
versions.  Work around this by renaming the CPU nodes for the 4xx files to a
generic node name, and specify the processor type in the model property of the
CPU node.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
diff --git a/arch/powerpc/boot/dts/ebony.dts b/arch/powerpc/boot/dts/ebony.dts
index 331c424..3cb2849 100644
--- a/arch/powerpc/boot/dts/ebony.dts
+++ b/arch/powerpc/boot/dts/ebony.dts
@@ -16,14 +16,15 @@
 	#size-cells = <1>;
 	model = "ibm,ebony";
 	compatible = "ibm,ebony";
-	dcr-parent = <&/cpus/PowerPC,440GP@0>;
+	dcr-parent = <&/cpus/cpu@0>;
 
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		PowerPC,440GP@0 {
+		cpu@0 {
 			device_type = "cpu";
+			model = "PowerPC,440GP";
 			reg = <0>;
 			clock-frequency = <0>; // Filled in by zImage
 			timebase-frequency = <0>; // Filled in by zImage