ARM: ux500: Supply the DMA clock lookup to the DBX500 DT

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/ste-dbx5x0.dtsi

@@ -228,6 +228,8 @@ dma: dma-controller@801C0000 {
 
 			#dma-cells = <3>;
 			memcpy-channels = <56 57 58 59 60>;
+
+			clocks = <&prcmu_clk PRCMU_DMACLK>;
 		};
 
 		prcmu: prcmu@80157000 {