arm: dts: socfpga: enables i2c0 in socfpga_de0_nano

Add all the appropriate i2c alias in the base socfpga dtsi and enables
the i2c node on the DE0 NANO board.
Signed-off-by: NDinh Nguyen <dinguyen@kernel.org>

arch/arm/dts/socfpga.dtsi

@@ -14,6 +14,10 @@
 	aliases {
 		ethernet0 = &gmac0;
 		ethernet1 = &gmac1;
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2c2 = &i2c2;
+		i2c3 = &i2c3;
 		serial0 = &uart0;
 		serial1 = &uart1;
 		timer0 = &timer0;

arch/arm/dts/socfpga_cyclone5_de0_nano_soc.dts

@@ -56,6 +56,18 @@
 	status = "okay";
 };
 
+&i2c0 {
+	status = "okay";
+
+	dxl345: adxl345@0 {
+		compatible = "adi,adxl345";
+		reg = <0x53>;
+
+		interrupt-parent = <&portc>;
+		interrupts = <3 2>;
+	};
+};
+
 &mmc0 {
 	status = "okay";
 	u-boot,dm-pre-reloc;