staging: iio: adc: ad7280a: use devm_* APIs

devm_* APIs are device managed and make code simpler.

Signed-off-by: Slawomir Stepien <sst@poczta.fm>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Slawomir Stepien 2018-11-11 16:59:11 +01:00 • committed by Jonathan Cameron
commit cc9c58ef6e