ARM: dts: imx53: Add capture-subsystem device

Add video capture_subsystem device node, and include both CSI ports.
Prepare for adding sensors by adding the parallel sensor anchor endpoints
to the CSI ports.

Signed-off-by: Steve Longerbeam <[e-mail]>
Signed-off-by: Fabio Estevam <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx53.dtsi

···
 		i2c0 = &i2c1;
 		i2c1 = &i2c2;
 		i2c2 = &i2c3;
+		ipu0 = &ipu;
 		mmc0 = &esdhc1;
 		mmc1 = &esdhc2;
 		mmc2 = &esdhc3;
···
 	display-subsystem {
 		compatible = "fsl,imx-display-subsystem";
 		ports = <&ipu_di0>, <&ipu_di1>;
+	};
+
+	capture_subsystem {
+		compatible = "fsl,imx-capture-subsystem";
+		ports = <&ipu_csi0>, <&ipu_csi1>;
 	};
 
 	tzic: tz-interrupt-controller@fffc000 {
···
 
 			ipu_csi0: port@0 {
 				reg = <0>;
+
+				ipu_csi0_from_parallel_sensor: endpoint {
+				};
 			};
 
 			ipu_csi1: port@1 {
 				reg = <1>;
+
+				ipu_csi1_from_parallel_sensor: endpoint {
+				};
 			};
 
 			ipu_di0: port@2 {