This driver makes use of triggered buffers, but does not select the
required modules.
Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'.
Fixes: 7c1d1677b322 ("iio: accel: Support Kionix/ROHM KX022A accelerometer")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx>