arm: dts: Fix missing device_type="memory" for ste-ccu8540

The current .dts for ste-ccu8540 lacks a 'device_type = "memory"' for
its memory node, relying on an old ppc quirk in order to discover its
memory. Fix the data so that all parsing code can handle it correctly.
Signed-off-by: NLeif Lindholm <leif.lindholm@linaro.org>
Acked-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: devicetree@vger.kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: NGrant Likely <grant.likely@linaro.org>

arch/arm/boot/dts/ste-ccu8540.dts

@@ -18,6 +18,7 @@ / {
 	compatible = "st-ericsson,ccu8540", "st-ericsson,u8540";
 
 	memory@0 {
+		device_type = "memory";
 		reg = <0x20000000 0x1f000000>, <0xc0000000 0x3f000000>;
 	};