iio: accel: kxcjk-1013: add some blank lines for readability

Some extra blank lines between if checks don't hurt and improve
readability.

Signed-off-by: Antonio Ospite <ao2@ao2.it>
Cc: Bastien Nocera <hadess@hadess.net>
Reviewed-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>