[POWERPC] 85xx: Add next-level-cache property

Added next-level-cache to the L1 and a reference to the new L2 label.
This is per the ePAPR 0.94 spec.  Since we are't really dependent on this
today we aren't supporting the "legacy" l2-cache phandle that is specified
in the PPC v2.1 OF Binding spec.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/boot/dts/mpc8568mds.dts b/arch/powerpc/boot/dts/mpc8568mds.dts
index d9064ee..d7af8db 100644
--- a/arch/powerpc/boot/dts/mpc8568mds.dts
+++ b/arch/powerpc/boot/dts/mpc8568mds.dts
@@ -42,6 +42,7 @@
 			timebase-frequency = <0>;
 			bus-frequency = <0>;
 			clock-frequency = <0>;
+			next-level-cache = <&L2>;
 		};
 	};
 
@@ -70,7 +71,7 @@
 			interrupts = <18 2>;
 		};
 
-		l2-cache-controller@20000 {
+		L2: l2-cache-controller@20000 {
 			compatible = "fsl,8568-l2-cache-controller";
 			reg = <0x20000 0x1000>;
 			cache-line-size = <32>;	// 32 bytes