ARM: dts: imx53: Add IPU nodes for csi

We have the following messages that tell csi devices are not used:
imx-ipuv3 18000000.ipu: no port@0 node in /soc/ipu@18000000, not using CSI0
imx-ipuv3 18000000.ipu: no port@1 node in /soc/ipu@18000000, not using CSI1

So we add them in the common device tree to make CSI ports available on
imx53 boards.

Signed-off-by: Fabien Lahoudere <[e-mail]>
Acked-by: Philipp Zabel <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx53.dtsi

···
 			clock-names = "bus", "di0", "di1";
 			resets = <&src 2>;
 
+			ipu_csi0: port@0 {
+				reg = <0>;
+			};
+
+			ipu_csi1: port@1 {
+				reg = <1>;
+			};
+
 			ipu_di0: port@2 {
 				#address-cells = <1>;
 				#size-cells = <0>;