ARM: dts: imx6qdl/imx6sl: add the dma property for uart

Add the dma property for all the uart.

Note: Add the dma property does not mean we enable the dma for this
uart.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6q-arm2.dts

@@ -102,8 +102,6 @@
 	pinctrl-0 = <&pinctrl_uart2_2>;
 	fsl,dte-mode;
 	fsl,uart-has-rtscts;
-	dma-names = "rx", "tx";
-	dmas = <&sdma 27 4 0>, <&sdma 28 4 0>;
 	status = "okay";
 };