[lib][trusty][ipc] Move definition of is_ns_client out of tipc_dev.h

This CL is to support alternative/multiple implementations of external
TIPC interfaces. The "is_ns_client" routine is called by TIPC kernel
implementation to check if specified uuid belongs to non-secure
world. This routine is typically implemented by a module that declares
configuration of external TIPC interface and assigns their uuids.

Change-Id: If0e7cfc14c3d26852c8684d18823c1a9419a6858
3 files changed