[SQUASH ME] basic_net: adapt for changes in PR #1549
[SQUASH ME] basic_net: Add capability to unregister upper layer threads
[SQUASH ME] basic_net: transceiver: adapt transceiver adapfter for PR #1549
[SQUASH ME] basic_net: move to net module
[SQUASH ME] dummy_mac: adapt for PR #1549
[SQUASH ME] basic_net: adapt for #1492
[SQUASH ME] dummy_mac: adapt for PR #1492
[SQUASH ME] Remove dummy mac functionality tests