Merge pull request #10384 from bergzand/pr/netdev/ref_nid

cpu/cc2538/include/cc2538_rf.h

cpu/cc2538/radio/cc2538_rf.c

cpu/cc2538/radio/cc2538_rf_netdev.c

cpu/native/socket_zep/socket_zep.c

drivers/at86rf2xx/at86rf2xx.c

drivers/at86rf2xx/at86rf2xx_getset.c

drivers/cc2420/cc2420.c

drivers/cc2420/cc2420_getset.c

drivers/include/at86rf2xx.h

drivers/include/cc2420.h

drivers/include/kw2xrf.h

drivers/kw2xrf/kw2xrf.c

drivers/kw2xrf/kw2xrf_getset.c

drivers/mrf24j40/mrf24j40.c

drivers/mrf24j40/mrf24j40_getset.c

drivers/netdev_ieee802154/netdev_ieee802154.c