ARM: dts: rockchip: add rga node for rk322x

Add a node to define the presence of RGA, a 2D raster graphic
acceleration unit.
Signed-off-by: Justin Swartz <justin.swartz@risingedge.co.za>
Link: https://lore.kernel.org/r/20200419125134.29923-2-justin.swartz@risingedge.co.zaSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk322x.dtsi

@@ -615,6 +615,16 @@ vop_mmu: iommu@20053f00 {
 		status = "disabled";
 	};
 
+	rga: rga@20060000 {
+		compatible = "rockchip,rk3228-rga", "rockchip,rk3288-rga";
+		reg = <0x20060000 0x1000>;
+		interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru ACLK_RGA>, <&cru HCLK_RGA>, <&cru SCLK_RGA>;
+		clock-names = "aclk", "hclk", "sclk";
+		resets = <&cru SRST_RGA>, <&cru SRST_RGA_A>, <&cru SRST_RGA_H>;
+		reset-names = "core", "axi", "ahb";
+	};
+
 	iep_mmu: iommu@20070800 {
 		compatible = "rockchip,iommu";
 		reg = <0x20070800 0x100>;