ARM: kirkwood: Instantiate L2 cache from DT.

Now that the Feroceon L2 cache has a DT binding, make use of it.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/kirkwood.dtsi

@@ -161,6 +161,11 @@ gate_clk: clock-gating-control@2011c {
 			#clock-cells = <1>;
 		};
 
+		l2: l2-cache@20128 {
+			compatible = "marvell,kirkwood-cache";
+			reg = <0x20128 0x4>;
+		};
+
 		intc: main-interrupt-ctrl@20200 {
 			compatible = "marvell,orion-intc";
 			interrupt-controller;