The incorrect semaphore was used for the ipc1 instance to synchronise
the data receiving.
This commit fixes it.
Signed-off-by: Marcin Jelinski <marcin.jelinski@nordicsemi.no>
There are more ipc_service backends that supports multiple endpoint.
This sample can be used for any of those backends, so this commits
makes the sample more generic. The default backend it still icmsg_me,
but now, the sample has files and instructions for icmsg_with_buf
backend.
Signed-off-by: Dominik Kilian <Dominik.Kilian@nordicsemi.no>