cpu/lm4f120/gpio: use gpio_irq feature
cpu/lm4f120/gpio: use gpio_irq feature

OlegHahm/RIOT,toonst/RIOT,rfuentess/RIOT,mtausig/RIOT,OTAkeys/RIOT,rfuentess/RIOT,kbumsik/RIOT,jasonatran/RIOT,gebart/RIOT,kaspar030/RIOT,mtausig/RIOT,biboc/RIOT,miri64/RIOT,A-Paul/RIOT,josephnoir/RIOT,smlng/RIOT,biboc/RIOT,yogo1212/RIOT,mfrey/RIOT,gebart/RIOT,toonst/RIOT,BytesGalore/RIOT,toonst/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,gebart/RIOT,authmillenon/RIOT,kaspar030/RIOT,aeneby/RIOT,BytesGalore/RIOT,cladmi/RIOT,OlegHahm/RIOT,biboc/RIOT,yogo1212/RIOT,OlegHahm/RIOT,x3ro/RIOT,smlng/RIOT,authmillenon/RIOT,ant9000/RIOT,kbumsik/RIOT,A-Paul/RIOT,gebart/RIOT,lazytech-org/RIOT,BytesGalore/RIOT,basilfx/RIOT,kYc0o/RIOT,rfuentess/RIOT,smlng/RIOT,basilfx/RIOT,lazytech-org/RIOT,BytesGalore/RIOT,A-Paul/RIOT,cladmi/RIOT,OlegHahm/RIOT,basilfx/RIOT,josephnoir/RIOT,OTAkeys/RIOT,yogo1212/RIOT,cladmi/RIOT,basilfx/RIOT,miri64/RIOT,aeneby/RIOT,biboc/RIOT,lazytech-org/RIOT,kYc0o/RIOT,rfuentess/RIOT,A-Paul/RIOT,yogo1212/RIOT,OTAkeys/RIOT,kbumsik/RIOT,aeneby/RIOT,aeneby/RIOT,kYc0o/RIOT,authmillenon/RIOT,kbumsik/RIOT,x3ro/RIOT,ant9000/RIOT,mfrey/RIOT,RIOT-OS/RIOT,x3ro/RIOT,kaspar030/RIOT,jasonatran/RIOT,OTAkeys/RIOT,authmillenon/RIOT,authmillenon/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,BytesGalore/RIOT,kaspar030/RIOT,mtausig/RIOT,kaspar030/RIOT,rfuentess/RIOT,gebart/RIOT,miri64/RIOT,kbumsik/RIOT,jasonatran/RIOT,basilfx/RIOT,ant9000/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,ant9000/RIOT,mfrey/RIOT,miri64/RIOT,cladmi/RIOT,josephnoir/RIOT,x3ro/RIOT,biboc/RIOT,mfrey/RIOT,toonst/RIOT,yogo1212/RIOT,josephnoir/RIOT,RIOT-OS/RIOT,smlng/RIOT,OlegHahm/RIOT,yogo1212/RIOT,aeneby/RIOT,mtausig/RIOT,authmillenon/RIOT,toonst/RIOT,ant9000/RIOT,josephnoir/RIOT,smlng/RIOT,miri64/RIOT,kYc0o/RIOT,mtausig/RIOT,cladmi/RIOT,lazytech-org/RIOT,x3ro/RIOT,A-Paul/RIOT,lazytech-org/RIOT,mfrey/RIOT