ARM: mediatek: dts: Add uart to Aquaris5

This patch enables uart port for the Aquaris5 mobile phone.
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm/boot/dts/mt6589-aquaris5.dts

@@ -21,10 +21,20 @@ / {
 	compatible = "mundoreader,bq-aquaris5", "mediatek,mt6589";
 
 	chosen {
-		bootargs = "earlyprintk";
+		bootargs = "console=ttyS0,921600n8 earlyprintk";
+		stdout-path = &uart0;
 	};
 
 	memory {
 		reg = <0x80000000 0x40000000>;
 	};
+
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&uart3 {
+	status = "okay";
 };