ARM: dts: imx6qdl: Remove #address/#size-cells from mipi_dsi

Remove unnecessary #address-cells/#size-cells to fix the following
DTC warnings:

arch/arm/boot/dts/imx6dl-apf6dev.dtb: Warning (avoid_unnecessary_addr_size): /soc/aips-bus@2100000/mipi@21e0000: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property
Signed-off-by: NFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl.dtsi

@@ -1187,8 +1187,6 @@
 			};
 
 			mipi_dsi: mipi@21e0000 {
-				#address-cells = <1>;
-				#size-cells = <0>;
 				reg = <0x021e0000 0x4000>;
 				status = "disabled";