Refactor only. The surrounding ifdefs are intentionally not changed in
this patch. They will be in the near future.
Rename the pool and generalize the documentation to allow using this
pool for other events that fit the same criteria. This pool can be used
for any buffer that is processed synchronously, without negatively
affecting 'num complete' messages. E.g. 'cmd complete/status' can be put
in this pool already.
We will be working towards making the host process all event buffers
synchronously. This is because events have no dedicated flow control,
and discarding events in the driver without informing the host creates
problems. Discarding should instead happen in the host higher layers
when unavoidable.
Signed-off-by: Aleksander Wasaznik <aleksander.wasaznik@nordicsemi.no>