ARM: dts: lager: Move cec_clock to root node

cec-clock is a fixed clock generator that is not controlled by i2c-12
and thus should not be a child of the i2c-12 bus node. Rather, it should
be a child of the root node of the DT.

Fixes: c5aa8797 ("ARM: dts: lager: Add CEC clock for HDMI transmitter")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7790-lager.dts

@@ -247,6 +247,12 @@ hdmi_con_in: endpoint {
 		};
 	};
 
+	cec_clock: cec-clock {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <12000000>;
+	};
+
 	hdmi-out {
 		compatible = "hdmi-connector";
 		type = "a";
@@ -352,12 +358,6 @@ adv7180: endpoint {
 			};
 		};
 
-		cec_clock: cec-clock {
-			compatible = "fixed-clock";
-			#clock-cells = <0>;
-			clock-frequency = <12000000>;
-		};
-
 		hdmi@39 {
 			compatible = "adi,adv7511w";
 			reg = <0x39>;