iio: accel: adxl345: complete the list of defines

Having interrupts events and FIFO available allows to evaluate the
sensor events. Cover the list of interrupt based sensor events. Keep
them in the header file for readability.

Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://patch.msgid.link/20241228232949.72487-5-l.rubusch@gmail.com


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