iio: adc: pac1934: Return -ENOMEM on memory allocation failure
devm_kzalloc() returns NULL on allocation failure. The appropriate error
code for this condition is -ENOMEM, not -EINVAL.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
authored by