extmod/modlwip: Allow to compile with MICROPY_PY_LWIP disabled.
extmod/modlwip: Allow to compile with MICROPY_PY_LWIP disabled.

tralamazza/micropython,tobbad/micropython,kerneltask/micropython,MrSurly/micropython,adafruit/circuitpython,tralamazza/micropython,trezor/micropython,pfalcon/micropython,bvernoux/micropython,pramasoul/micropython,pramasoul/micropython,kerneltask/micropython,dmazzella/micropython,tralamazza/micropython,tobbad/micropython,adafruit/circuitpython,trezor/micropython,pramasoul/micropython,henriknelson/micropython,MrSurly/micropython,pfalcon/micropython,dmazzella/micropython,trezor/micropython,kerneltask/micropython,henriknelson/micropython,pozetroninc/micropython,tralamazza/micropython,selste/micropython,adafruit/circuitpython,pozetroninc/micropython,pozetroninc/micropython,swegener/micropython,swegener/micropython,adafruit/micropython,henriknelson/micropython,pfalcon/micropython,adafruit/circuitpython,adafruit/circuitpython,trezor/micropython,adafruit/micropython,MrSurly/micropython,pfalcon/micropython,henriknelson/micropython,bvernoux/micropython,swegener/micropython,MrSurly/micropython,pozetroninc/micropython,swegener/micropython,tobbad/micropython,adafruit/micropython,selste/micropython,dmazzella/micropython,trezor/micropython,bvernoux/micropython,adafruit/circuitpython,henriknelson/micropython,dmazzella/micropython,pramasoul/micropython,MrSurly/micropython,kerneltask/micropython,pozetroninc/micropython,adafruit/micropython,pramasoul/micropython,selste/micropython,selste/micropython,swegener/micropython,bvernoux/micropython,bvernoux/micropython,kerneltask/micropython,adafruit/micropython,tobbad/micropython,pfalcon/micropython,selste/micropython,tobbad/micropython