drivers: net: adapt to iolist-using netdev

boards/native/Makefile.dep

cpu/cc2538/radio/cc2538_rf_netdev.c

cpu/native/socket_zep/socket_zep.c

cpu/nrf5x_common/radio/nrfmin/nrfmin.c

cpu/nrf5x_common/radio/nrfmin/nrfmin_gnrc.c

drivers/Makefile.dep

drivers/at86rf2xx/at86rf2xx_netdev.c

drivers/cc110x/cc110x-netdev.c

drivers/cc110x/gnrc_cc110x/gnrc_cc110x.c

drivers/cc2420/cc2420.c

drivers/cc2420/cc2420_netdev.c

drivers/enc28j60/enc28j60.c

drivers/encx24j600/encx24j600.c

drivers/ethos/ethos.c

drivers/include/cc2420.h

drivers/kw2xrf/kw2xrf_netdev.c

drivers/mrf24j40/mrf24j40_netdev.c

drivers/slipdev/slipdev.c

drivers/sx127x/sx127x_netdev.c

drivers/w5100/w5100.c