iio: imu: st_lsm6dsx: add entry in MAINTAINERS file

Add entry for st_lsm6dsx imu driver in MAINTAINERS file
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

MAINTAINERS

@@ -13767,6 +13767,14 @@ M:	Jan-Benedict Glaw <jbglaw@lug-owl.de>
 S:	Maintained
 F:	arch/alpha/kernel/srm_env.c
 
+ST LSM6DSx IMU IIO DRIVER
+M:	Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+L:	linux-iio@vger.kernel.org
+W:	http://www.st.com/
+S:	Maintained
+F:	drivers/iio/imu/st_lsm6dsx/
+F:	Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt
+
 ST STM32 I2C/SMBUS DRIVER
 M:	Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
 L:	linux-i2c@vger.kernel.org