Added support to LPS22DB ST MEMS pressure and temperature sensor
List of supported features:
- Configurable ODRs [Power_Off ... 75] Hz
- Sensor Event Timestamp support
- Read single raw data values for pressure and temperature
- FIFO:
> Pressure data stored in FIFO
> HW Watermark configuration
> Custom Flush command / event support
Signed-off-by: mario tesi <mario.tesi@st.com>
Change-Id: I435b87f7377b43cd34cb766968ca6326815c186c
