iio: accel: mma8452: fix indentation

Improve readability by fixing indentation.
Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Link: https://lore.kernel.org/r/20210301080029.1974797-1-sean@geanix.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>