Add support to STM LSM6DSOP (acc + gyro) Mems sensor
https://www.st.com/resource/en/datasheet/lsm6dsop.pdfSigned-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/d3c459ad945ccd1a256f4a217128be214b0c024e.1606642528.git.lorenzo@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>