iio: magnetometer: bmc150_magn: minor formatting cleanup

iio: magnetometer: bmc150_magn: minor formatting cleanup

Improve initializer list style for bmc150_magn_samp_freq_table by
moving the opening brace to its own line and using one entry per line
with proper indentation and spaces inside braces.

Add spaces inside braces for initializer lists in the preset table
for consistency.

Fix indentation of bmc150_magn_scan_masks array. No functional changes.

Signed-off-by: Neel Bullywon <neelb2403@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>