staging:iio:accel:sca3000: Event_attribute_group seems to be missing for _info_with_temp

issue introduced here 6fe8135f:
staging:iio: implement an iio_info structure to take some of the constant elements out of iio_dev

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>