sys/newlib/syscalls.c: Clean up function prototypes
sys/newlib/syscalls.c: Clean up function prototypes

Yonezawa-T2/RIOT,RBartz/RIOT,luciotorre/RIOT,lebrush/RIOT,toonst/RIOT,adrianghc/RIOT,authmillenon/RIOT,mziegert/RIOT,ks156/RIOT,alignan/RIOT,kaleb-himes/RIOT,x3ro/RIOT,dkm/RIOT,jasonatran/RIOT,OlegHahm/RIOT,brettswann/RIOT,dhruvvyas90/RIOT,abkam07/RIOT,alex1818/RIOT,rajma996/RIOT,Lexandro92/RIOT-CoAP,kerneltask/RIOT,adrianghc/RIOT,herrfz/RIOT,mfrey/RIOT,binarylemon/RIOT,wentaoshang/RIOT,cladmi/RIOT,Darredevil/RIOT,ant9000/RIOT,TobiasFredersdorf/RIOT,x3ro/RIOT,brettswann/RIOT,bartfaizoltan/RIOT,kaspar030/RIOT,DipSwitch/RIOT,Yonezawa-T2/RIOT,d00616/RIOT,abp719/RIOT,MohmadAyman/RIOT,immesys/RiSyn,RBartz/RIOT,jremmert-phytec-iot/RIOT,DipSwitch/RIOT,cladmi/RIOT,avmelnikoff/RIOT,lebrush/RIOT,katezilla/RIOT,ant9000/RIOT,altairpearl/RIOT,watr-li/RIOT,kb2ma/RIOT,khhhh/RIOT,stevenj/RIOT,rajma996/RIOT,ntrtrung/RIOT,JensErdmann/RIOT,Lexandro92/RIOT-CoAP,kerneltask/RIOT,FrancescoErmini/RIOT,gautric/RIOT,rousselk/RIOT,gbarnett/RIOT,daniel-k/RIOT,Darredevil/RIOT,roberthartung/RIOT,l3nko/RIOT,abkam07/RIOT,authmillenon/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,thiagohd/RIOT,patkan/RIOT,attdona/RIOT,TobiasFredersdorf/RIOT,miri64/RIOT,basilfx/RIOT,miri64/RIOT,jremmert-phytec-iot/RIOT,immesys/RiSyn,smlng/RIOT,yogo1212/RIOT,Hyungsin/RIOT-OS,biboc/RIOT,jremmert-phytec-iot/RIOT,MonsterCode8000/RIOT,kbumsik/RIOT,alignan/RIOT,abkam07/RIOT,syin2/RIOT,RBartz/RIOT,x3ro/RIOT,josephnoir/RIOT,zhuoshuguo/RIOT,backenklee/RIOT,jremmert-phytec-iot/RIOT,openkosmosorg/RIOT,MarkXYang/RIOT,tfar/RIOT,DipSwitch/RIOT,OTAkeys/RIOT,mziegert/RIOT,alignan/RIOT,abkam07/RIOT,ntrtrung/RIOT,kaleb-himes/RIOT,attdona/RIOT,authmillenon/RIOT,ThanhVic/RIOT,toonst/RIOT,beurdouche/RIOT,neiljay/RIOT,jbeyerstedt/RIOT-OTA-update,msolters/RIOT,rousselk/RIOT,josephnoir/RIOT,DipSwitch/RIOT,l3nko/RIOT,lazytech-org/RIOT,kbumsik/RIOT,LudwigOrtmann/RIOT,LudwigOrtmann/RIOT,kerneltask/RIOT,openkosmosorg/RIOT,Hyungsin/RIOT-OS,neumodisch/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,A-Paul/RIOT,kaleb-himes/RIOT,automote/RIOT,mziegert/RIOT,neumodisch/RIOT,msolters/RIOT,plushvoxel/RIOT,kaspar030/RIOT,alex1818/RIOT,MohmadAyman/RIOT,latsku/RIOT,yogo1212/RIOT,altairpearl/RIOT,alex1818/RIOT,hamilton-mote/RIOT-OS,openkosmosorg/RIOT,cladmi/RIOT,attdona/RIOT,A-Paul/RIOT,Lexandro92/RIOT-CoAP,jfischer-phytec-iot/RIOT,dhruvvyas90/RIOT,gbarnett/RIOT,kYc0o/RIOT,watr-li/RIOT,RubikonAlpha/RIOT,MarkXYang/RIOT,aeneby/RIOT,wentaoshang/RIOT,thiagohd/RIOT,malosek/RIOT,syin2/RIOT,A-Paul/RIOT,alignan/RIOT,LudwigOrtmann/RIOT,gebart/RIOT,Yonezawa-T2/RIOT,RBartz/RIOT,MonsterCode8000/RIOT,smlng/RIOT,MonsterCode8000/RIOT,RBartz/RIOT,zhuoshuguo/RIOT,binarylemon/RIOT,Lexandro92/RIOT-CoAP,msolters/RIOT,authmillenon/RIOT,khhhh/RIOT,BytesGalore/RIOT,kaleb-himes/RIOT,thiagohd/RIOT,binarylemon/RIOT,LudwigKnuepfer/RIOT,OlegHahm/RIOT,neumodisch/RIOT,altairpearl/RIOT,rakendrathapa/RIOT,patkan/RIOT,immesys/RiSyn,RubikonAlpha/RIOT,msolters/RIOT,jbeyerstedt/RIOT-OTA-update,mziegert/RIOT,kerneltask/RIOT,biboc/RIOT,beurdouche/RIOT,automote/RIOT,ant9000/RIOT,wentaoshang/RIOT,aeneby/RIOT,adrianghc/RIOT,toonst/RIOT,altairpearl/RIOT,beurdouche/RIOT,MarkXYang/RIOT,gbarnett/RIOT,daniel-k/RIOT,basilfx/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,TobiasFredersdorf/RIOT,rakendrathapa/RIOT,JensErdmann/RIOT,avmelnikoff/RIOT,Yonezawa-T2/RIOT,JensErdmann/RIOT,tfar/RIOT,robixnai/RIOT,malosek/RIOT,x3ro/RIOT,wentaoshang/RIOT,brettswann/RIOT,mfrey/RIOT,patkan/RIOT,OTAkeys/RIOT,luciotorre/RIOT,dailab/RIOT,syin2/RIOT,A-Paul/RIOT,daniel-k/RIOT,Hyungsin/RIOT-OS,smlng/RIOT,plushvoxel/RIOT,arvindpdmn/RIOT,bartfaizoltan/RIOT,d00616/RIOT,syin2/RIOT,ThanhVic/RIOT,Darredevil/RIOT,rakendrathapa/RIOT,malosek/RIOT,robixnai/RIOT,rfuentess/RIOT,l3nko/RIOT,lebrush/RIOT,backenklee/RIOT,LudwigKnuepfer/RIOT,kb2ma/RIOT,rousselk/RIOT,shady33/RIOT,l3nko/RIOT,binarylemon/RIOT,robixnai/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,backenklee/RIOT,lebrush/RIOT,abkam07/RIOT,BytesGalore/RIOT,smlng/RIOT,OlegHahm/RIOT,rfuentess/RIOT,RubikonAlpha/RIOT,avmelnikoff/RIOT,adjih/RIOT,RubikonAlpha/RIOT,asanka-code/RIOT,adrianghc/RIOT,herrfz/RIOT,haoyangyu/RIOT,haoyangyu/RIOT,DipSwitch/RIOT,kerneltask/RIOT,herrfz/RIOT,RIOT-OS/RIOT,backenklee/RIOT,OTAkeys/RIOT,altairpearl/RIOT,dkm/RIOT,Josar/RIOT,dhruvvyas90/RIOT,jbeyerstedt/RIOT-OTA-update,attdona/RIOT,d00616/RIOT,FrancescoErmini/RIOT,shady33/RIOT,lebrush/RIOT,BytesGalore/RIOT,asanka-code/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,jfischer-phytec-iot/RIOT,daniel-k/RIOT,LudwigOrtmann/RIOT,herrfz/RIOT,kaleb-himes/RIOT,rousselk/RIOT,tfar/RIOT,dailab/RIOT,lazytech-org/RIOT,malosek/RIOT,abp719/RIOT,miri64/RIOT,Osblouf/RIOT,abp719/RIOT,roberthartung/RIOT,Darredevil/RIOT,gebart/RIOT,mtausig/RIOT,authmillenon/RIOT,aeneby/RIOT,dailab/RIOT,Ell-i/RIOT,dailab/RIOT,Josar/RIOT,jfischer-phytec-iot/RIOT,luciotorre/RIOT,abp719/RIOT,dkm/RIOT,Ell-i/RIOT,MohmadAyman/RIOT,lazytech-org/RIOT,rfuentess/RIOT,bartfaizoltan/RIOT,Osblouf/RIOT,watr-li/RIOT,rfuentess/RIOT,Josar/RIOT,Lexandro92/RIOT-CoAP,robixnai/RIOT,mfrey/RIOT,gautric/RIOT,watr-li/RIOT,dkm/RIOT,OlegHahm/RIOT,automote/RIOT,msolters/RIOT,rakendrathapa/RIOT,OTAkeys/RIOT,l3nko/RIOT,neumodisch/RIOT,toonst/RIOT,EmuxEvans/RIOT,mfrey/RIOT,kYc0o/RIOT,zhuoshuguo/RIOT,brettswann/RIOT,cladmi/RIOT,neumodisch/RIOT,neiljay/RIOT,rousselk/RIOT,dhruvvyas90/RIOT,yogo1212/RIOT,hamilton-mote/RIOT-OS,avmelnikoff/RIOT,robixnai/RIOT,EmuxEvans/RIOT,Osblouf/RIOT,khhhh/RIOT,mtausig/RIOT,arvindpdmn/RIOT,haoyangyu/RIOT,watr-li/RIOT,shady33/RIOT,kYc0o/RIOT,khhhh/RIOT,roberthartung/RIOT,bartfaizoltan/RIOT,rajma996/RIOT,alignan/RIOT,bartfaizoltan/RIOT,Darredevil/RIOT,plushvoxel/RIOT,thomaseichinger/RIOT,alex1818/RIOT,Josar/RIOT,Hyungsin/RIOT-OS,biboc/RIOT,immesys/RiSyn,RubikonAlpha/RIOT,basilfx/RIOT,dailab/RIOT,rousselk/RIOT,OlegHahm/RIOT,ks156/RIOT,yogo1212/RIOT,jasonatran/RIOT,daniel-k/RIOT,rajma996/RIOT,latsku/RIOT,dhruvvyas90/RIOT,thomaseichinger/RIOT,Yonezawa-T2/RIOT,automote/RIOT,neiljay/RIOT,ant9000/RIOT,BytesGalore/RIOT,MarkXYang/RIOT,JensErdmann/RIOT,gebart/RIOT,luciotorre/RIOT,lazytech-org/RIOT,d00616/RIOT,katezilla/RIOT,zhuoshuguo/RIOT,Osblouf/RIOT,EmuxEvans/RIOT,ThanhVic/RIOT,shady33/RIOT,hamilton-mote/RIOT-OS,thiagohd/RIOT,MarkXYang/RIOT,binarylemon/RIOT,RIOT-OS/RIOT,khhhh/RIOT,lazytech-org/RIOT,Josar/RIOT,EmuxEvans/RIOT,josephnoir/RIOT,beurdouche/RIOT,jasonatran/RIOT,jbeyerstedt/RIOT-OTA-update,jasonatran/RIOT,stevenj/RIOT,LudwigOrtmann/RIOT,MohmadAyman/RIOT,immesys/RiSyn,mfrey/RIOT,neiljay/RIOT,roberthartung/RIOT,shady33/RIOT,ThanhVic/RIOT,daniel-k/RIOT,katezilla/RIOT,automote/RIOT,lebrush/RIOT,authmillenon/RIOT,rakendrathapa/RIOT,patkan/RIOT,mtausig/RIOT,jbeyerstedt/RIOT-OTA-update,automote/RIOT,asanka-code/RIOT,ks156/RIOT,adjih/RIOT,ThanhVic/RIOT,abkam07/RIOT,asanka-code/RIOT,gautric/RIOT,roberthartung/RIOT,jremmert-phytec-iot/RIOT,stevenj/RIOT,yogo1212/RIOT,openkosmosorg/RIOT,stevenj/RIOT,mziegert/RIOT,attdona/RIOT,RBartz/RIOT,TobiasFredersdorf/RIOT,abp719/RIOT,kaspar030/RIOT,RubikonAlpha/RIOT,jasonatran/RIOT,kYc0o/RIOT,arvindpdmn/RIOT,attdona/RIOT,smlng/RIOT,brettswann/RIOT,kaspar030/RIOT,EmuxEvans/RIOT,miri64/RIOT,rfuentess/RIOT,MonsterCode8000/RIOT,adjih/RIOT,adjih/RIOT,tfar/RIOT,haoyangyu/RIOT,beurdouche/RIOT,DipSwitch/RIOT,MonsterCode8000/RIOT,wentaoshang/RIOT,ntrtrung/RIOT,thomaseichinger/RIOT,ThanhVic/RIOT,mziegert/RIOT,bartfaizoltan/RIOT,openkosmosorg/RIOT,stevenj/RIOT,thomaseichinger/RIOT,binarylemon/RIOT,dkm/RIOT,katezilla/RIOT,kb2ma/RIOT,kb2ma/RIOT,MohmadAyman/RIOT,gautric/RIOT,haoyangyu/RIOT,plushvoxel/RIOT,basilfx/RIOT,alex1818/RIOT,asanka-code/RIOT,mtausig/RIOT,alex1818/RIOT,wentaoshang/RIOT,Hyungsin/RIOT-OS,tfar/RIOT,FrancescoErmini/RIOT,MonsterCode8000/RIOT,Ell-i/RIOT,neumodisch/RIOT,backenklee/RIOT,biboc/RIOT,MohmadAyman/RIOT,LudwigKnuepfer/RIOT,FrancescoErmini/RIOT,josephnoir/RIOT,latsku/RIOT,kaspar030/RIOT,ant9000/RIOT,ntrtrung/RIOT,Osblouf/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,dhruvvyas90/RIOT,d00616/RIOT,luciotorre/RIOT,zhuoshuguo/RIOT,msolters/RIOT,cladmi/RIOT,patkan/RIOT,Ell-i/RIOT,JensErdmann/RIOT,d00616/RIOT,biboc/RIOT,altairpearl/RIOT,avmelnikoff/RIOT,katezilla/RIOT,EmuxEvans/RIOT,zhuoshuguo/RIOT,gbarnett/RIOT,thiagohd/RIOT,arvindpdmn/RIOT,TobiasFredersdorf/RIOT,miri64/RIOT,hamilton-mote/RIOT-OS,immesys/RiSyn,OTAkeys/RIOT,rajma996/RIOT,ks156/RIOT,kbumsik/RIOT,openkosmosorg/RIOT,gbarnett/RIOT,brettswann/RIOT,MarkXYang/RIOT,latsku/RIOT,shady33/RIOT,l3nko/RIOT,gebart/RIOT,toonst/RIOT,basilfx/RIOT,JensErdmann/RIOT,A-Paul/RIOT,ntrtrung/RIOT,ntrtrung/RIOT,gebart/RIOT,LudwigKnuepfer/RIOT,haoyangyu/RIOT,thomaseichinger/RIOT,LudwigOrtmann/RIOT,gbarnett/RIOT,ks156/RIOT,latsku/RIOT,stevenj/RIOT,jfischer-phytec-iot/RIOT,patkan/RIOT,jremmert-phytec-iot/RIOT,Ell-i/RIOT,Yonezawa-T2/RIOT,herrfz/RIOT,mtausig/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,x3ro/RIOT,watr-li/RIOT,LudwigKnuepfer/RIOT,syin2/RIOT,asanka-code/RIOT,thiagohd/RIOT,luciotorre/RIOT,BytesGalore/RIOT,malosek/RIOT,herrfz/RIOT,robixnai/RIOT,RIOT-OS/RIOT,kbumsik/RIOT,aeneby/RIOT,Darredevil/RIOT,latsku/RIOT,gautric/RIOT,josephnoir/RIOT,malosek/RIOT,arvindpdmn/RIOT,kbumsik/RIOT,FrancescoErmini/RIOT,adrianghc/RIOT,hamilton-mote/RIOT-OS,Lexandro92/RIOT-CoAP,kb2ma/RIOT,FrancescoErmini/RIOT,adjih/RIOT,Osblouf/RIOT,khhhh/RIOT,abp719/RIOT,arvindpdmn/RIOT,rajma996/RIOT,plushvoxel/RIOT,jfischer-phytec-iot/RIOT,aeneby/RIOT,neiljay/RIOT,rakendrathapa/RIOT