Some restructing of the CC3000 build

configs/freedom-kl25z/README.txt

configs/freedom-kl25z/nsh/defconfig

configs/freedom-kl25z/src/kl_wifi.c

drivers/Makefile

drivers/wireless/Kconfig

drivers/wireless/Make.defs

drivers/wireless/cc3000/cc3000_common.c

drivers/wireless/cc3000/evnt_handler.c

drivers/wireless/cc3000/hci.c

drivers/wireless/cc3000/netapp.c

drivers/wireless/cc3000/nvmem.c

drivers/wireless/cc3000/security.c

drivers/wireless/cc3000/socket.c

drivers/wireless/cc3000/spi.c

drivers/wireless/cc3000/wlan.c

include/nuttx/wireless/cc3000/cc3000_common.h

include/nuttx/wireless/cc3000/evnt_handler.h

include/nuttx/wireless/cc3000/hci.h

include/nuttx/wireless/cc3000/host_driver_version.h

include/nuttx/wireless/cc3000/netapp.h