arm64: dts: rockchip: make dts use gpio-fan matrix instead of array

No functional changes.

Adjust to comply with dt-schema requirements
and make possible to validate values.
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://lore.kernel.org/r/20231209171653.85468-2-david@ixit.czSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi

@@ -44,7 +44,7 @@ dc_12v: dc-12v {
 	fan0: gpio-fan {
 		#cooling-cells = <2>;
 		compatible = "gpio-fan";
-		gpio-fan,speed-map = <0 0 3000 1>;
+		gpio-fan,speed-map = <0 0>, <3000 1>;
 		gpios = <&gpio1 RK_PC2 GPIO_ACTIVE_HIGH>;
 		status = "okay";
 	};

arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts

@@ -31,8 +31,9 @@ gmac1_clkin: external-gmac1-clock {
 	fan: gpio_fan {
 		compatible = "gpio-fan";
 		gpios = <&gpio0 RK_PD5 GPIO_ACTIVE_HIGH>;
-		gpio-fan,speed-map = <0    0
-				      4500 1>;
+		gpio-fan,speed-map =
+				<   0 0>,
+				<4500 1>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&fan_en_h>;
 		#cooling-cells = <2>;