iio: accel: kxsd9-spi: changed leading spaces to tabs

Changed the leading spaces to tabs, in accordance with kernel coding
conventions, and removed trailing comma.
Found with checkpatch.

Signed-off-by: Paul Lemmermann <thepaulodoom@thepaulodoom.com>
Link: https://lore.kernel.org/r/YkInN6SL7pP2f5Sf@hp-amd-paul


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