dtoverlays: Add 4 lane option to imx708

As the driver now supports 4 data lane readout, and
it as an option to the overlay

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

Author: 6by9

arch/arm/boot/dts/overlays/README

@@ -3058,6 +3058,7 @@ Params: rotation                Mounting rotation of the camera sensor (0 or
                                 Compute Module (CSI0, i2c_vc, and cam0_reg).
         link-frequency          Allowable link frequency values to use in Hz:
                                 450000000 (default), 447000000, 453000000.
+        4lane                   Use 4 CSI2 data lanes.
 
 
 Name:   interludeaudio-analog

arch/arm/boot/dts/overlays/imx708-overlay.dts

@@ -81,6 +81,20 @@
 		};
 	};
 
+	fragment@201 {
+		target = <&csi_ep>;
+		__dormant__ {
+			data-lanes = <1 2 3 4>;
+		};
+	};
+
+	fragment@202 {
+		target = <&cam_endpoint>;
+		__dormant__ {
+			data-lanes = <1 2 3 4>;
+		};
+	};
+
 	__overrides__ {
 		rotation = <&cam_node>,"rotation:0";
 		orientation = <&cam_node>,"orientation:0";
@@ -95,6 +109,7 @@
 		vcm = <&vcm_node>, "status",
 		      <0>, "=4";
 		link-frequency = <&cam_endpoint>,"link-frequencies#0";
+		4lane = <0>, "+201+202";
 	};
 };