arm64: dts: Add DMA device node for Spreadtrum SC9860

The Spreadtrum SC9860 platform has two DMA controllers, one is located
on the ap-ahb system, and another one is located on the agcp system.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm64/boot/dts/sprd/whale2.dtsi

@@ -107,6 +107,23 @@ uart3: serial@300000 {
 			};
 		};
 
+		ap-ahb {
+			compatible = "simple-bus";
+			#address-cells = <2>;
+			#size-cells = <2>;
+			ranges;
+
+			ap_dma: dma-controller@20100000 {
+				compatible = "sprd,sc9860-dma";
+				reg = <0 0x20100000 0 0x4000>;
+				interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
+				#dma-cells = <1>;
+				#dma-channels = <32>;
+				clock-names = "enable";
+				clocks = <&apahb_gate CLK_DMA_EB>;
+			};
+		};
+
 		aon {
 			compatible = "simple-bus";
 			#address-cells = <2>;
@@ -151,6 +168,23 @@ watchdog@40310000 {
 				clocks = <&aon_gate CLK_APCPU_WDG_EB>;
 			};
 		};
+
+		agcp {
+			compatible = "simple-bus";
+			#address-cells = <2>;
+			#size-cells = <2>;
+			ranges;
+
+			agcp_dma: dma-controller@41580000 {
+				compatible = "sprd,sc9860-dma";
+				reg = <0 0x41580000 0 0x4000>;
+				#dma-cells = <1>;
+				#dma-channels = <32>;
+				clock-names = "enable", "ashb_eb";
+				clocks = <&agcp_gate CLK_AGCP_DMAAP_EB>,
+				       <&agcp_gate CLK_AGCP_AP_ASHB_EB>;
+			};
+		};
 	};
 
 	ext_32k: ext_32k {