iio: imu: adis16480: fix indentation of return statement

This is just a minor indentation/alignment fix for the default case of a
switch statement.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/adis16480.c

@@ -459,7 +459,7 @@ static int adis16480_get_calibbias(struct iio_dev *indio_dev,
 		*bias = sign_extend32(val32, 31);
 		break;
 	default:
-			ret = -EINVAL;
+		ret = -EINVAL;
 	}
 
 	if (ret)