arm64: dts: rockchip: minor whitespace cleanup around '='

The DTS code coding style expects exactly one space before and after '='
sign.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230702185242.44421-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3566-radxa-cm3-io.dts

@@ -137,8 +137,8 @@ &hdmi_sound {
 
 &mdio1 {
 	rgmii_phy1: ethernet-phy@0 {
-		compatible="ethernet-phy-ieee802.3-c22";
-		reg= <0x0>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <0x0>;
 	};
 };