kinetis: Fix shiftTooManyBitsSigned warning in GPIO driver
kinetis: Fix shiftTooManyBitsSigned warning in GPIO driver

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