frdm-k64f: Correct and format ADC pin configuration
frdm-k64f: Correct and format ADC pin configuration

Only ADC1 has a connection with the configured pins, the chosen channels
on ADC0 are connected to other pins.

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