iio: light: cm32181: Switch to new style i2c-driver probe function

Switch to the new style i2c-driver probe_new probe function and drop the
unnecessary i2c_device_id table (we do not have any old style board files
using this).

This is a preparation patch for adding ACPI binding support.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>