ARM: dts: imx27: use new 'dma-channels' property

The '#dma-channels' property was deprecated in favor of one defined by
generic dma-common DT bindings.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx27.dtsi

@@ -96,7 +96,7 @@ dma: dma@10001000 {
 					 <&clks IMX27_CLK_DMA_AHB_GATE>;
 				clock-names = "ipg", "ahb";
 				#dma-cells = <1>;
-				#dma-channels = <16>;
+				dma-channels = <16>;
 			};
 
 			wdog: watchdog@10002000 {