ARM: digicolor: dts: add uart pin configuration

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/cx92755_equinox.dts

@@ -70,8 +70,17 @@ chosen {
 
 &uart0 {
 	status = "okay";
+	pinctrl-0 = <&uart0_default>;
+	pinctrl-names = "default";
 };
 
 &i2c {
 	status = "okay";
 };
+
+&pinctrl {
+	uart0_default: uart0_active {
+		pins = "GP_O0", "GP_O1";
+		function = "client_b";
+	};
+};