iio: adc: ad7091r: Align arguments to function call parenthesis

Align arguments to function call open parenthesis to comply with the
Linux kernel coding style.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Link: https://lore.kernel.org/r/fc71a82d3b4a6bc6f511f27451dbd7a3280a8c95.1702746240.git.marcelo.schmitt1@gmail.com


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