Add LWIP stm32 glue code
Add LWIP stm32 glue code

Fix minor coding style issues

authmillenon/RIOT,kaspar030/RIOT,miri64/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,josephnoir/RIOT,aeneby/RIOT,toonst/RIOT,smlng/RIOT,mtausig/RIOT,jasonatran/RIOT,jasonatran/RIOT,smlng/RIOT,authmillenon/RIOT,ant9000/RIOT,basilfx/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,aeneby/RIOT,OTAkeys/RIOT,ant9000/RIOT,kYc0o/RIOT,OlegHahm/RIOT,kaspar030/RIOT,kaspar030/RIOT,x3ro/RIOT,kYc0o/RIOT,OTAkeys/RIOT,authmillenon/RIOT,basilfx/RIOT,mtausig/RIOT,yogo1212/RIOT,kYc0o/RIOT,basilfx/RIOT,authmillenon/RIOT,basilfx/RIOT,OlegHahm/RIOT,x3ro/RIOT,aeneby/RIOT,x3ro/RIOT,jasonatran/RIOT,mtausig/RIOT,yogo1212/RIOT,miri64/RIOT,josephnoir/RIOT,mtausig/RIOT,kaspar030/RIOT,yogo1212/RIOT,authmillenon/RIOT,kYc0o/RIOT,josephnoir/RIOT,smlng/RIOT,authmillenon/RIOT,jasonatran/RIOT,yogo1212/RIOT,jasonatran/RIOT,ant9000/RIOT,josephnoir/RIOT,toonst/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,x3ro/RIOT,RIOT-OS/RIOT,aeneby/RIOT,ant9000/RIOT,toonst/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,kYc0o/RIOT,OTAkeys/RIOT,mtausig/RIOT,toonst/RIOT,smlng/RIOT,OlegHahm/RIOT,miri64/RIOT,RIOT-OS/RIOT,josephnoir/RIOT,aeneby/RIOT,miri64/RIOT,ant9000/RIOT,miri64/RIOT,smlng/RIOT,toonst/RIOT,kaspar030/RIOT,x3ro/RIOT,basilfx/RIOT