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Use devm_iio_device_register() to avoid remove function and
drop explicit call to iio_device_unregister().
Signed-off-by: Mugilraj Dhavachelvan <dmugil2000@gmail.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20210314175709.34301-1-dmugil2000@gmail.com

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