iio: adc: Update return value checks

Clean up some return value checks to make code more compact.

Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Jishnu Prakash 2020-05-28 22:24:27 +05:30 • committed by Jonathan Cameron
commit 35fbb7f00d