cpu/atmega2560: Update timer_init to match API change
cpu/atmega2560: Update timer_init to match API change

jremmert-phytec-iot/RIOT,jfischer-phytec-iot/RIOT,altairpearl/RIOT,mtausig/RIOT,attdona/RIOT,MohmadAyman/RIOT,A-Paul/RIOT,dailab/RIOT,miri64/RIOT,toonst/RIOT,lazytech-org/RIOT,wentaoshang/RIOT,LudwigOrtmann/RIOT,rakendrathapa/RIOT,wentaoshang/RIOT,hamilton-mote/RIOT-OS,rfuentess/RIOT,aeneby/RIOT,basilfx/RIOT,josephnoir/RIOT,zhuoshuguo/RIOT,RIOT-OS/RIOT,kerneltask/RIOT,mtausig/RIOT,Ell-i/RIOT,syin2/RIOT,wentaoshang/RIOT,Hyungsin/RIOT-OS,lazytech-org/RIOT,OlegHahm/RIOT,smlng/RIOT,kb2ma/RIOT,dailab/RIOT,d00616/RIOT,smlng/RIOT,adjih/RIOT,jfischer-phytec-iot/RIOT,katezilla/RIOT,neiljay/RIOT,wentaoshang/RIOT,jasonatran/RIOT,gebart/RIOT,mtausig/RIOT,kaspar030/RIOT,miri64/RIOT,basilfx/RIOT,Hyungsin/RIOT-OS,backenklee/RIOT,adjih/RIOT,roberthartung/RIOT,mfrey/RIOT,alignan/RIOT,toonst/RIOT,A-Paul/RIOT,BytesGalore/RIOT,immesys/RiSyn,kbumsik/RIOT,MohmadAyman/RIOT,kb2ma/RIOT,katezilla/RIOT,alignan/RIOT,jremmert-phytec-iot/RIOT,kaleb-himes/RIOT,zhuoshuguo/RIOT,basilfx/RIOT,asanka-code/RIOT,basilfx/RIOT,Josar/RIOT,cladmi/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,TobiasFredersdorf/RIOT,OTAkeys/RIOT,yogo1212/RIOT,immesys/RiSyn,OTAkeys/RIOT,MohmadAyman/RIOT,kbumsik/RIOT,biboc/RIOT,syin2/RIOT,shady33/RIOT,biboc/RIOT,mfrey/RIOT,rakendrathapa/RIOT,kb2ma/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,Yonezawa-T2/RIOT,attdona/RIOT,dkm/RIOT,MohmadAyman/RIOT,plushvoxel/RIOT,kbumsik/RIOT,malosek/RIOT,kYc0o/RIOT,dkm/RIOT,rfuentess/RIOT,syin2/RIOT,altairpearl/RIOT,plushvoxel/RIOT,ks156/RIOT,kaspar030/RIOT,Ell-i/RIOT,A-Paul/RIOT,altairpearl/RIOT,jfischer-phytec-iot/RIOT,kerneltask/RIOT,adrianghc/RIOT,alignan/RIOT,shady33/RIOT,josephnoir/RIOT,attdona/RIOT,ks156/RIOT,mtausig/RIOT,kbumsik/RIOT,rfuentess/RIOT,neumodisch/RIOT,dkm/RIOT,beurdouche/RIOT,avmelnikoff/RIOT,yogo1212/RIOT,avmelnikoff/RIOT,thomaseichinger/RIOT,kbumsik/RIOT,katezilla/RIOT,rajma996/RIOT,cladmi/RIOT,gebart/RIOT,gautric/RIOT,toonst/RIOT,miri64/RIOT,beurdouche/RIOT,cladmi/RIOT,rakendrathapa/RIOT,tfar/RIOT,tfar/RIOT,x3ro/RIOT,asanka-code/RIOT,LudwigOrtmann/RIOT,brettswann/RIOT,neumodisch/RIOT,miri64/RIOT,thomaseichinger/RIOT,ks156/RIOT,TobiasFredersdorf/RIOT,adrianghc/RIOT,wentaoshang/RIOT,LudwigOrtmann/RIOT,d00616/RIOT,A-Paul/RIOT,rousselk/RIOT,ant9000/RIOT,tfar/RIOT,OTAkeys/RIOT,ant9000/RIOT,Hyungsin/RIOT-OS,lazytech-org/RIOT,RIOT-OS/RIOT,shady33/RIOT,zhuoshuguo/RIOT,yogo1212/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,asanka-code/RIOT,smlng/RIOT,zhuoshuguo/RIOT,kerneltask/RIOT,malosek/RIOT,Hyungsin/RIOT-OS,asanka-code/RIOT,rakendrathapa/RIOT,yogo1212/RIOT,jbeyerstedt/RIOT-OTA-update,neumodisch/RIOT,alignan/RIOT,hamilton-mote/RIOT-OS,zhuoshuguo/RIOT,LudwigKnuepfer/RIOT,adjih/RIOT,kaleb-himes/RIOT,rousselk/RIOT,Yonezawa-T2/RIOT,kYc0o/RIOT,kaspar030/RIOT,roberthartung/RIOT,cladmi/RIOT,dailab/RIOT,zhuoshuguo/RIOT,OlegHahm/RIOT,ks156/RIOT,lazytech-org/RIOT,immesys/RiSyn,hamilton-mote/RIOT-OS,plushvoxel/RIOT,jasonatran/RIOT,BytesGalore/RIOT,adrianghc/RIOT,jfischer-phytec-iot/RIOT,authmillenon/RIOT,Yonezawa-T2/RIOT,LudwigKnuepfer/RIOT,neiljay/RIOT,mtausig/RIOT,shady33/RIOT,dailab/RIOT,aeneby/RIOT,thomaseichinger/RIOT,ks156/RIOT,jremmert-phytec-iot/RIOT,jremmert-phytec-iot/RIOT,Josar/RIOT,kb2ma/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,basilfx/RIOT,katezilla/RIOT,rfuentess/RIOT,OTAkeys/RIOT,plushvoxel/RIOT,backenklee/RIOT,LudwigOrtmann/RIOT,ant9000/RIOT,Josar/RIOT,neumodisch/RIOT,Hyungsin/RIOT-OS,ant9000/RIOT,LudwigKnuepfer/RIOT,malosek/RIOT,kerneltask/RIOT,neiljay/RIOT,syin2/RIOT,mfrey/RIOT,gautric/RIOT,rousselk/RIOT,jbeyerstedt/RIOT-OTA-update,wentaoshang/RIOT,jbeyerstedt/RIOT-OTA-update,rakendrathapa/RIOT,OlegHahm/RIOT,jasonatran/RIOT,LudwigOrtmann/RIOT,backenklee/RIOT,x3ro/RIOT,Yonezawa-T2/RIOT,jfischer-phytec-iot/RIOT,immesys/RiSyn,altairpearl/RIOT,cladmi/RIOT,brettswann/RIOT,OlegHahm/RIOT,josephnoir/RIOT,asanka-code/RIOT,attdona/RIOT,rajma996/RIOT,OlegHahm/RIOT,x3ro/RIOT,x3ro/RIOT,aeneby/RIOT,gebart/RIOT,authmillenon/RIOT,gautric/RIOT,gebart/RIOT,neiljay/RIOT,jbeyerstedt/RIOT-OTA-update,malosek/RIOT,aeneby/RIOT,thomaseichinger/RIOT,toonst/RIOT,kaspar030/RIOT,tfar/RIOT,BytesGalore/RIOT,kYc0o/RIOT,altairpearl/RIOT,jremmert-phytec-iot/RIOT,beurdouche/RIOT,RIOT-OS/RIOT,FrancescoErmini/RIOT,rousselk/RIOT,brettswann/RIOT,kaleb-himes/RIOT,katezilla/RIOT,beurdouche/RIOT,rajma996/RIOT,smlng/RIOT,jbeyerstedt/RIOT-OTA-update,backenklee/RIOT,adrianghc/RIOT,Ell-i/RIOT,OTAkeys/RIOT,Josar/RIOT,jasonatran/RIOT,malosek/RIOT,adjih/RIOT,rajma996/RIOT,kerneltask/RIOT,rakendrathapa/RIOT,authmillenon/RIOT,gautric/RIOT,FrancescoErmini/RIOT,tfar/RIOT,ant9000/RIOT,josephnoir/RIOT,MohmadAyman/RIOT,brettswann/RIOT,miri64/RIOT,attdona/RIOT,BytesGalore/RIOT,TobiasFredersdorf/RIOT,FrancescoErmini/RIOT,jasonatran/RIOT,rousselk/RIOT,adrianghc/RIOT,jremmert-phytec-iot/RIOT,RIOT-OS/RIOT,d00616/RIOT,dkm/RIOT,BytesGalore/RIOT,Josar/RIOT,immesys/RiSyn,biboc/RIOT,neumodisch/RIOT,avmelnikoff/RIOT,hamilton-mote/RIOT-OS,yogo1212/RIOT,Ell-i/RIOT,rajma996/RIOT,backenklee/RIOT,avmelnikoff/RIOT,altairpearl/RIOT,d00616/RIOT,neiljay/RIOT,toonst/RIOT,d00616/RIOT,beurdouche/RIOT,rfuentess/RIOT,josephnoir/RIOT,kaleb-himes/RIOT,dkm/RIOT,kb2ma/RIOT,yogo1212/RIOT,lazytech-org/RIOT,A-Paul/RIOT,TobiasFredersdorf/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,roberthartung/RIOT,d00616/RIOT,FrancescoErmini/RIOT,gebart/RIOT,rajma996/RIOT,TobiasFredersdorf/RIOT,LudwigOrtmann/RIOT,kYc0o/RIOT,syin2/RIOT,asanka-code/RIOT,kYc0o/RIOT,biboc/RIOT,hamilton-mote/RIOT-OS,avmelnikoff/RIOT,authmillenon/RIOT,authmillenon/RIOT,FrancescoErmini/RIOT,attdona/RIOT,Ell-i/RIOT,brettswann/RIOT,plushvoxel/RIOT,roberthartung/RIOT,shady33/RIOT,x3ro/RIOT,immesys/RiSyn,smlng/RIOT,kaleb-himes/RIOT,FrancescoErmini/RIOT,mfrey/RIOT,alignan/RIOT,mfrey/RIOT,MohmadAyman/RIOT,aeneby/RIOT,LudwigKnuepfer/RIOT,biboc/RIOT,adjih/RIOT,Yonezawa-T2/RIOT,gautric/RIOT,roberthartung/RIOT,dailab/RIOT,neumodisch/RIOT,Yonezawa-T2/RIOT,authmillenon/RIOT,malosek/RIOT,brettswann/RIOT,thomaseichinger/RIOT,LudwigKnuepfer/RIOT,shady33/RIOT,rousselk/RIOT