ARM: dts: enable GPU for SolidRun's Cubox

Enable the GPU for SolidRun's Cubox.
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-cubox.dts

@@ -62,6 +62,10 @@
 		pinctrl-0 = <&pmx_gpio_19>;
 		pinctrl-names = "default";
 	};
+
+	gpu-subsystem {
+		status = "okay";
+	};
 };
 
 &uart0 { status = "okay"; };
@@ -74,6 +78,10 @@
 	reg = <1>;
 };
 
+&gpu {
+	status = "okay";
+};
+
 &i2c0 {
 	status = "okay";
 	clock-frequency = <100000>;