ARM: dts: dove: add DT GPU support

Add DT support for the Vivante GC600 GPU on Marvell Dove platforms.
These nodes default to being disabled unless a platform decides they
should be enabled.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NLucas Stach <l.stach@pengutronix.de>
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm/boot/dts/dove.dtsi

@@ -33,6 +33,12 @@
 		marvell,tauros2-cache-features = <0>;
 	};
 
+	gpu-subsystem {
+		compatible = "marvell,dove-gpu-subsystem";
+		cores = <&gpu>;
+		status = "disabled";
+	};
+
 	i2c-mux {
 		compatible = "i2c-mux-pinctrl";
 		#address-cells = <1>;
@@ -782,6 +788,16 @@
 				#address-cells = <1>;
 				#size-cells = <1>;
 			};
+
+			gpu: gpu@840000 {
+				clocks = <&divider_clk 1>;
+				clock-names = "core";
+				compatible = "vivante,gc";
+				interrupts = <48>;
+				power-domains = <&gpu_domain>;
+				reg = <0x840000 0x4000>;
+				status = "disabled";
+			};
 		};
 	};
 };