dtoverlays: Use continuous clock mode for ov9281

This increases the maximum frame rate from 247 to 260fps in
10-bit mode.

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

Author: 6by9

arch/arm/boot/dts/overlays/ov9281-overlay.dts

@@ -28,7 +28,6 @@
 				csi_ep: endpoint {
 					remote-endpoint = <&cam_endpoint>;
 					data-lanes = <1 2>;
-					clock-noncontinuous;
 				};
 			};
 		};

arch/arm/boot/dts/overlays/ov9281.dtsi

@@ -19,7 +19,6 @@ cam_node: ov9281@60 {
 		cam_endpoint: endpoint {
 			clock-lanes = <0>;
 			data-lanes = <1 2>;
-			clock-noncontinuous;
 			link-frequencies =
 				/bits/ 64 <400000000>;
 		};