ARM: ux500: Pass DMA memcpy channels though Device Tree

It's now possible to configure memcpy channels dynamically with DT.
We're providing them despite the fact that they're the same as the
hard-coded channels, as they will be removed once the u8500 platform
goes DT-only.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/dbx5x0.dtsi

@@ -218,6 +218,7 @@
 			interrupts = <0 25 0x4>;
 
 			#dma-cells = <3>;
+			memcpy-channels = <56 57 58 59 60>;
 		};
 
 		prcmu: prcmu@80157000 {