ARM: dts: sun8i: nanopi-duo2: Fix GPIO regulator state array

Even though it translates to the same thing down to the binary level, we
should have an array of 2 number cells to describe each voltage state,
which in turns create a validation warning.

Let's fix this.
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>

arch/arm/boot/dts/sun8i-h3-nanopi-duo2.dts

@@ -60,8 +60,7 @@ reg_vdd_cpux: vdd-cpux-regulator {
 		enable-gpio = <&r_pio 0 8 GPIO_ACTIVE_HIGH>; /* PL8 */
 		gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */
 		gpios-states = <0x1>;
-		states = <1100000 0x0
-			  1300000 0x1>;
+		states = <1100000 0>, <1300000 1>;
 	};
 
 	reg_vcc_dram: vcc-dram {