QDEC sensor driver fails to inform user of the overflow in the
ACC register, which makes the most recently fetched data invalid.
An error code return has been added to nrfx_qdec_sample_fetch(),
that indicates that an overflow has occured, based on oveflow flag.
Also, raw_acc field was added in the qdec_nrfx_data structure, to
adjust QDEC to sensor API rules - two subsequent sensor_channel_get()
calls should will yield the same values.
Signed-off-by: Michał Stasiak <michal.stasiak@nordicsemi.no>
2e6c83dd4c