arm64: dts: sun50i-a64: Add i2c2 pins

PinePhone needs I2C2 pins description. Add it, and make it default
for i2c2, since it's the only possiblilty.
Signed-off-by: Ondrej Jirman <megous@megous.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>

arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi

@@ -671,6 +671,11 @@ i2c1_pins: i2c1-pins {
 				function = "i2c1";
 			};
 
+			i2c2_pins: i2c2-pins {
+				pins = "PE14", "PE15";
+				function = "i2c2";
+			};
+
 			/omit-if-no-ref/
 			lcd_rgb666_pins: lcd-rgb666-pins {
 				pins = "PD0", "PD1", "PD2", "PD3", "PD4",
@@ -958,12 +963,13 @@ i2c2: i2c@1c2b400 {
 			interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&ccu CLK_BUS_I2C2>;
 			resets = <&ccu RST_BUS_I2C2>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&i2c2_pins>;
 			status = "disabled";
 			#address-cells = <1>;
 			#size-cells = <0>;
 		};
 
-
 		spi0: spi@1c68000 {
 			compatible = "allwinner,sun8i-h3-spi";
 			reg = <0x01c68000 0x1000>;