dtoverlays: Enable cam1_clock when using tc358743 or irs1125

This fixes a regression introduced in 131f132
(see also #4791).
The tc358743 driver refused to bind to the device. The irs1125
driver is likely behaving similarly.

The new unified cam1_clk node that represents the fixed on-board
oscillator is marked as disabled by default. These overlays didn't
expect this and so the clock nodes were stuck in disabled state.

This commit just adds the required status = "okay" line. Other sensor
drivers do this too.

arch/arm/boot/dts/overlays/irs1125-overlay.dts

@@ -75,6 +75,7 @@
 	clk_frag: fragment@5 {
 		target = <&cam1_clk>;
 		__overlay__ {
+			status = "okay";
 			clock-frequency = <26000000>;
 		};
 	};

arch/arm/boot/dts/overlays/tc358743-overlay.dts

@@ -78,6 +78,7 @@
 	clk_frag: fragment@6 {
 		target = <&cam1_clk>;
 		__overlay__ {
+			status = "okay";
 			clock-frequency = <27000000>;
 		};
 	};