ARM: dts: armada-370-rn104: add pinmuxing for i2c0

Up to now a working i2c bus depended on the bootloader to configure the
pinmuxing. Make it explicit.

As a side effect this change makes i2c work in barebox.
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm/boot/dts/armada-370-netgear-rn104.dts

@@ -128,6 +128,10 @@ usb@50000 {
 			i2c@11000 {
 				compatible = "marvell,mv64xxx-i2c";
 				clock-frequency = <100000>;
+
+				pinctrl-0 = <&i2c0_pins>;
+				pinctrl-names = "default";
+
 				status = "okay";
 
 				isl12057: isl12057@68 {