cpu/stm32f4: adapted to PWM interface changes
cpu/stm32f4: adapted to PWM interface changes

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jih/RIOT,brettswann/RIOT,smlng/RIOT,x3ro/RIOT,tfar/RIOT,jremmert-phytec-iot/RIOT,FrancescoErmini/RIOT,kerneltask/RIOT,altairpearl/RIOT,FrancescoErmini/RIOT,smlng/RIOT,neumodisch/RIOT,mtausig/RIOT,lazytech-org/RIOT,brettswann/RIOT,lazytech-org/RIOT,thomaseichinger/RIOT,miri64/RIOT,RIOT-OS/RIOT,LudwigKnuepfer/RIOT,malosek/RIOT,hamilton-mote/RIOT-OS,zhuoshuguo/RIOT,rajma996/RIOT,adrianghc/RIOT,kbumsik/RIOT,immesys/RiSyn,toonst/RIOT,biboc/RIOT,kaleb-himes/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,rajma996/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,katezilla/RIOT,jasonatran/RIOT,kaleb-himes/RIOT,attdona/RIOT,shady33/RIOT,Ell-i/RIOT,immesys/RiSyn,toonst/RIOT,attdona/RIOT,gebart/RIOT,BytesGalore/RIOT,rajma996/RIOT,plushvoxel/RIOT,Ell-i/RIOT,cladmi/RIOT,thomaseichinger/RIOT,x3ro/RIOT,LudwigOrtmann/RIOT,BytesGalore/RIOT,roberthartung/RIOT,mfrey/RIOT,shady33/RIOT,asanka-code/RIOT,cladmi/RIOT,mfrey/RIOT,mfrey/RIOT,alignan/RIOT,kbumsik/RIOT,ks156/RIOT,authmillenon/RIOT,backenklee/RIOT,dkm/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT