iio: common: ssp_sensors: Add sensorhub iio commons

This patch adds common library for sensorhub iio drivers.

Signed-off-by: Karol Wrona <k.wrona@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --cc drivers/iio/common/ssp_sensors/Kconfig
Simple merge

diff --cc drivers/iio/common/ssp_sensors/Makefile
Simple merge

diff --cc drivers/iio/common/ssp_sensors/ssp_iio.c
Simple merge

diff --cc drivers/iio/common/ssp_sensors/ssp_iio_sensor.h
Simple merge