staging: iio: adt7316: fix parenthesis alignment

This patch fixes most "Alignment should match open parenthesis" check
warnings found by checkpatch.pl in the addac/adt7316 driver.

Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>