PubSub: Add the pubsub_ethernet.h if required in the IOP example
PubSub: Add the pubsub_ethernet.h if required in the IOP example

StalderT/open62541,open62541/open62541,JGrothoff/open62541,jpfr/open62541,JGrothoff/open62541,jpfr/open62541,open62541/open62541,open62541/open62541,StalderT/open62541,jpfr/open62541,StalderT/open62541,JGrothoff/open62541,jpfr/open62541,JGrothoff/open62541,StalderT/open62541,open62541/open62541