staging:iio:meter: Aligns open parenthesis

This patch fixes the checkpatch.pl checks:

staging/iio/meter/ade7854-spi.c:19: CHECK: Alignment should match open
parenthesis
staging/iio/meter/ade7854-spi.c:44: CHECK: Alignment should match open
parenthesis
staging/iio/meter/ade7854-spi.c:70: CHECK: Alignment should match open
parenthesis
staging/iio/meter/ade7854-spi.c:97: CHECK: Alignment should match open
parenthesis
staging/iio/meter/ade7854-spi.c:125: CHECK: Alignment should match open
parenthesis

...
Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>