media: arm64: dts: renesas: aistarvision-mipi-adapter-2.1: Drop clock-names property

Now that the driver has been updated to drop fetching the clk reference by
name we no longer need the clock-names property in the ov5645 sensor node.

This is in preparation for removal for clock-names property from the DT
binding.

Signed-off-by: Lad Prabhakar <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

arch/arm64/boot/dts/renesas/aistarvision-mipi-adapter-2.1.dtsi

···
 	ov5645: ov5645@3c {
 		compatible = "ovti,ov5645";
 		reg = <0x3c>;
-		clock-names = "xclk";
 		clocks = <&osc25250_clk>;
 		clock-frequency = <24000000>;
 		vdddo-supply = <&ov5645_vdddo_1v8>;