arm64: dts: rockchip: Add gpu opp nodes to px30 dtsi

This matches the values in the vendor kernel.
Signed-off-by: Maciej Matuszczyk <maccraft123mc@gmail.com>
[added tiny commit description]
Link: https://lore.kernel.org/r/20210225081943.127714-1-maccraft123mc@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/px30.dtsi

@@ -984,6 +984,27 @@ nfc: nand-controller@ff3b0000 {
 		status = "disabled";
 	};
 
+	gpu_opp_table: opp-table2 {
+		compatible = "operating-points-v2";
+
+		opp-200000000 {
+			opp-hz = /bits/ 64 <200000000>;
+			opp-microvolt = <950000>;
+		};
+		opp-300000000 {
+			opp-hz = /bits/ 64 <300000000>;
+			opp-microvolt = <975000>;
+		};
+		opp-400000000 {
+			opp-hz = /bits/ 64 <400000000>;
+			opp-microvolt = <1050000>;
+		};
+		opp-480000000 {
+			opp-hz = /bits/ 64 <480000000>;
+			opp-microvolt = <1125000>;
+		};
+	};
+
 	gpu: gpu@ff400000 {
 		compatible = "rockchip,px30-mali", "arm,mali-bifrost";
 		reg = <0x0 0xff400000 0x0 0x4000>;
@@ -994,6 +1015,7 @@ gpu: gpu@ff400000 {
 		clocks = <&cru SCLK_GPU>;
 		#cooling-cells = <2>;
 		power-domains = <&power PX30_PD_GPU>;
+		operating-points-v2 = <&gpu_opp_table>;
 		status = "disabled";
 	};