* STM AIS328DQ Accelerometer sensor

This driver uses the NVidia Sensor (NVS) framework.
See the nvs.txt documentation for NVS DT capabilities.
The nvs_ais328dq.c sensor drivers supports the STM device.

Required properties:
- compatible: Device or generic name.
	      Supported device names:
	      - stm,ais328dq
  Note: If the part is known and is populated, then it can be specified:
	Example: compatible = "stm,ais328dq";
	When specifying a device this way, the driver will assume this specific
	device is populated during system boot and will not verify its
	existence. If the device is not found, the driver will unload itself.
	This requires regulators to be setup correctly for the probe function.
- reg: i2c address of the device. It should be 0x18.
- interrupt-parent:  GPIO number
- interrupts:  GPIO macro

Optional properties:
- status: set to "ok" or "okay" for normal operation.  Set to anything else
	  to unload the driver without ever communicating with the device.
  Note: The "anything else" above is typically "disabled".
	Since the driver will unload without communicating with the device, the
	device will be left in its POR state.
- accelerometer_disable: Setting this property to <1> will disable the
                         accelerometer.
- vdd-supply: regulator supply for the chip
- vlogic-supply: regulator supply for the chip
  Note: These are required if the driver is to control the regulators.
- accelerometer_matrix:  Orientation matrix for this device.
- accelerometer_delay_us_min: Change the max supported sampling rate.
- accelerometer_delay_us_max: Change the min supported sampling rate.
- stm_odr_override: Override the HW odr setting. This property is defined as
		    a list of tuples of the following form:
		    stm_odr_override = <
				20000	22222	0x20
				10000	11111	0x28
				2500	2778	0x30
				>;
		    where each tuple is described as follows:
			< Current_ODR override_ODR override_hw_ODR >
		    Current_ODR will be replaced by the override_ODR in the
		    stm_odr_tbl in the driver. The hw value will be replaced
		    by the override_hw_ODR.

Example:
	ais328dq@18 {
		compatible = "stm,ais328dq";
                reg = <0x18>;
                interrupt-parent = <&gpio>;
                interrupts = <TEGRA_GPIO(X, 2) 0x01>;
		accelerometer_matrix = [00 ff 00 ff 00 00 00 00 ff];
		accelerometer_delay_us_min = <2500>;
		stm_odr_override = <
				20000	22222	0x20
				10000	11111	0x28
				2500	2778	0x30
				>;
	};