Support for LSM6DSL accelerometer and gyroscpe sensor
with bare minimum features.
For more info on this sensor:
http://www.st.com/en/mems-and-sensors/lsm6dsl.html
Change-Id: I9b100a3e030faa8a70a5015a881025c876b81be4
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>