ARM: socfpga: dts: Add adxl34x

This patch adds the DTS bindings for the adxl34x digital
accelerometer.
Signed-off-by: NWalter Lozano <walter@vanguardiasur.com.ar>
Acked-by: NSteffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: NDinh Nguyen <dinguyen@opensource.altera.com>

arch/arm/boot/dts/socfpga_cyclone5_sockit.dts

@@ -68,3 +68,19 @@
 &usb1 {
 	status = "okay";
 };
+
+&gpio2 {
+	status = "okay";
+};
+
+&i2c1{
+	status = "okay";
+
+	accel1: accel1@53{
+		compatible = "adxl34x";
+		reg = <0x53>;
+
+		interrupt-parent = < &portc >;
+		interrupts = <3 2>;
+	};
+};