iio: magnetometer: rm3100: do not explicity set INDIO_BUFFER_TRIGGERED mode

The core sets INDIO_BUFFER_TRIGGERED as part of
devm_iio_triggered_buffer_setup().

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Link: https://lore.kernel.org/r/20220702085005.31666-1-marcus.folkesson@gmail.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>