ARM: dts: sun8i: h3-beelink-x2: align HDMI CEC node names with dtschema

The bindings expect "cec" for HDMI CEC node.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Acked-by: Jernej Skrabec <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jernej Skrabec <[e-mail]>

arch/arm/boot/dts/sun8i-h3-beelink-x2.dts

···
 		ethernet1 = &sdiowifi;
 	};
 
-	cec-gpio {
+	cec {
 		compatible = "cec-gpio";
 		cec-gpios = <&pio 0 14 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>; /* PA14 */
 		hdmi-phandle = <&hdmi>;