Merge pull request #2983 from jfischer-phytec-iot/pr@kw2x-rf-autoinit

boards/pba-d-01-kw2x/Makefile.dep

boards/pba-d-01-kw2x/Makefile.include

boards/pba-d-01-kw2x/include/board.h

boards/pba-d-01-kw2x/include/kw2xrf_params.h

boards/pba-d-01-kw2x/include/periph_conf.h

drivers/include/kw2xrf.h

sys/auto_init/auto_init.c

sys/auto_init/netif/auto_init_kw2xrf.c

tests/driver_kw2xrf/Makefile

tests/driver_kw2xrf/auto_init_ng_netif/Makefile

tests/driver_kw2xrf/auto_init_ng_netif/netif_app.c

tests/driver_kw2xrf/kw2xrf_params.h