cpu/stm32l1: make i2c thread-safe
cpu/stm32l1: make i2c thread-safe

kushalsingh007/RIOT,ks156/RIOT,latsku/RIOT,lebrush/RIOT,Lexandro92/RIOT-CoAP,tdautc19841202/RIOT,biboc/RIOT,fnack/RIOT,binarylemon/RIOT,DipSwitch/RIOT,RBartz/RIOT,tfar/RIOT,tfar/RIOT,gbarnett/RIOT,marcosalm/RIOT,wentaoshang/RIOT,cladmi/RIOT,latsku/RIOT,centurysys/RIOT,yogo1212/RIOT,adjih/RIOT,TobiasFredersdorf/RIOT,centurysys/RIOT,jasonatran/RIOT,benoit-canet/RIOT,Lexandro92/RIOT-CoAP,RubikonAlpha/RIOT,centurysys/RIOT,sgso/RIOT,jferreir/RIOT,miri64/RIOT,EmuxEvans/RIOT,MarkXYang/RIOT,malosek/RIOT,roberthartung/RIOT,Yonezawa-T2/RIOT,beurdouche/RIOT,ks156/RIOT,MonsterCode8000/RIOT,rousselk/RIOT,gbarnett/RIOT,A-Paul/RIOT,rousselk/RIOT,attdona/RIOT,immesys/RiSyn,benoit-canet/RIOT,smlng/RIOT,josephnoir/RIOT,gebart/RIOT,alex1818/RIOT,neumodisch/RIOT,malosek/RIOT,mfrey/RIOT,jasonatran/RIOT,neiljay/RIOT,msolters/RIOT,Yonezawa-T2/RIOT,cladmi/RIOT,marcosalm/RIOT,openkosmosorg/RIOT,zhuoshuguo/RIOT,stevenj/RIOT,ant9000/RIOT,kaspar030/RIOT,brettswann/RIOT,luciotorre/RIOT,Hyungsin/RIOT-OS,abkam07/RIOT,rfuentess/RIOT,ThanhVic/RIOT,miri64/RIOT,ximus/RIOT,bartfaizoltan/RIOT,wentaoshang/RIOT,sgso/RIOT,wentaoshang/RIOT,gautric/RIOT,adrianghc/RIOT,binarylemon/RIOT,adjih/RIOT,alignan/RIOT,hamilton-mote/RIOT-OS,mfrey/RIOT,lebrush/RIOT,mziegert/RIOT,OlegHahm/RIOT,gautric/RIOT,ximus/RIOT,LudwigOrtmann/RIOT,arvindpdmn/RIOT,LudwigKnuepfer/RIOT,kYc0o/RIOT,phiros/RIOT,mfrey/RIOT,thomaseichinger/RIOT,OlegHahm/RIOT,DipSwitch/RIOT,mfrey/RIOT,l3nko/RIOT,abp719/RIOT,abkam07/RIOT,khhhh/RIOT,Hyungsin/RIOT-OS,toonst/RIOT,EmuxEvans/RIOT,Yonezawa-T2/RIOT,altairpearl/RIOT,luciotorre/RIOT,abp719/RIOT,d00616/RIOT,rakendrathapa/RIOT,gebart/RIOT,plushvoxel/RIOT,plushvoxel/RIOT,phiros/RIOT,EmuxEvans/RIOT,herrfz/RIOT-old,plushvoxel/RIOT,patkan/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,MarkXYang/RIOT,patkan/RIOT,centurysys/RIOT,x3ro/RIOT,jasonatran/RIOT,authmillenon/RIOT,MohmadAyman/RIOT,MonsterCode8000/RIOT,kbumsik/RIOT,MonsterCode8000/RIOT,d00616/RIOT,rfswarm/RIOT,luciotorre/RIOT,Darredevil/RIOT,luciotorre/RIOT,Josar/RIOT,msolters/RIOT,Josar/RIOT,malosek/RIOT,chris-wood/RIOT,jremmert-phytec-iot/RIOT,MarkXYang/RIOT,neumodisch/RIOT,jremmert-phytec-iot/RIOT,marcosalm/RIOT,altairpearl/RIOT,Yonezawa-T2/RIOT,phiros/RIOT,miri64/RIOT,d00616/RIOT,JensErdmann/RIOT,dkm/RIOT,smlng/RIOT,RIOT-OS/RIOT,abp719/RIOT,dhruvvyas90/RIOT,kaleb-himes/RIOT,toonst/RIOT,tdautc19841202/RIOT,Osblouf/RIOT,phiros/RIOT,DipSwitch/RIOT,aeneby/RIOT,yogo1212/RIOT,bartfaizoltan/RIOT,openkosmosorg/RIOT,lazytech-org/RIOT,RubikonAlpha/RIOT,bartfaizoltan/RIOT,attdona/RIOT,BytesGalore/RIOT,roberthartung/RIOT,gautric/RIOT,kaspar030/RIOT,LudwigKnuepfer/RIOT,fnack/RIOT,ntrtrung/RIOT,thiagohd/RIOT,immesys/RiSyn,sumanpanchal/RIOT,patkan/RIOT,abkam07/RIOT,msolters/RIOT,basilfx/RIOT,daniel-k/RIOT,brettswann/RIOT,malosek/RIOT,roberthartung/RIOT,LudwigOrtmann/RIOT,jbeyerstedt/RIOT-OTA-update,Lexandro92/RIOT-CoAP,mtausig/RIOT,daniel-k/RIOT,authmillenon/RIOT,MonsterCode8000/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,zhuoshuguo/RIOT,rousselk/RIOT,DipSwitch/RIOT,hamilton-mote/RIOT-OS,kushalsingh007/RIOT,josephnoir/RIOT,wentaoshang/RIOT,stevenj/RIOT,brettswann/RIOT,l3nko/RIOT,miri64/RIOT,kaleb-himes/RIOT,aeneby/RIOT,Yonezawa-T2/RIOT,binarylemon/RIOT,herrfz/RIOT,rfswarm/RIOT,adjih/RIOT,attdona/RIOT,daniel-k/RIOT,thiagohd/RIOT,rakendrathapa/RIOT,kushalsingh007/RIOT,kbumsik/RIOT,Hyungsin/RIOT-OS,rakendrathapa/RIOT,ntrtrung/RIOT,Hyungsin/RIOT-OS,kb2ma/RIOT,FrancescoErmini/RIOT,alex1818/RIOT,kbumsik/RIOT,Osblouf/RIOT,Ell-i/RIOT,kb2ma/RIOT,ant9000/RIOT,alex1818/RIOT,MarkXYang/RIOT,syin2/RIOT,BytesGalore/RIOT,kerneltask/RIOT,daniel-k/RIOT,rousselk/RIOT,rfuentess/RIOT,jhollister/RIOT,Osblouf/RIOT,OTAkeys/RIOT,gbarnett/RIOT,OTAkeys/RIOT,herrfz/RIOT,JensErdmann/RIOT,tdautc19841202/RIOT,d00616/RIOT,sumanpanchal/RIOT,A-Paul/RIOT,RubikonAlpha/RIOT,neumodisch/RIOT,centurysys/RIOT,kaspar030/RIOT,marcosalm/RIOT,neiljay/RIOT,binarylemon/RIOT,attdona/RIOT,yogo1212/RIOT,TobiasFredersdorf/RIOT,FrancescoErmini/RIOT,abp719/RIOT,abkam07/RIOT,kaleb-himes/RIOT,x3ro/RIOT,haoyangyu/RIOT,OlegHahm/RIOT,adrianghc/RIOT,A-Paul/RIOT,biboc/RIOT,msolters/RIOT,rousselk/RIOT,beurdouche/RIOT,OTAkeys/RIOT,kushalsingh007/RIOT,neiljay/RIOT,jbeyerstedt/RIOT-OTA-update,mtausig/RIOT,binarylemon/RIOT,kYc0o/RIOT,katezilla/RIOT,ximus/RIOT,roberthartung/RIOT,brettswann/RIOT,rfswarm2/RIOT,FrancescoErmini/RIOT,ant9000/RIOT,benoit-canet/RIOT,stevenj/RIOT,asanka-code/RIOT,tfar/RIOT,asanka-code/RIOT,adjih/RIOT,TobiasFredersdorf/RIOT,RBartz/RIOT,chris-wood/RIOT,robixnai/RIOT,RubikonAlpha/RIOT,PSHIVANI/Riot-Code,yogo1212/RIOT,watr-li/RIOT,changbiao/RIOT,sumanpanchal/RIOT,asanka-code/RIOT,RIOT-OS/RIOT,neumodisch/RIOT,rfswarm2/RIOT,dhruvvyas90/RIOT,thomaseichinger/RIOT,authmillenon/RIOT,Darredevil/RIOT,smlng/RIOT,patkan/RIOT,latsku/RIOT,daniel-k/RIOT,fnack/RIOT,bartfaizoltan/RIOT,MohmadAyman/RIOT,ant9000/RIOT,dkm/RIOT,authmillenon/RIOT,sumanpanchal/RIOT,gbarnett/RIOT,watr-li/RIOT,FrancescoErmini/RIOT,LudwigOrtmann/RIOT,fnack/RIOT,kaleb-himes/RIOT,EmuxEvans/RIOT,Josar/RIOT,stevenj/RIOT,jremmert-phytec-iot/RIOT,mziegert/RIOT,syin2/RIOT,jfischer-phytec-iot/RIOT,robixnai/RIOT,OTAkeys/RIOT,l3nko/RIOT,lebrush/RIOT,Osblouf/RIOT,tfar/RIOT,jhollister/RIOT,altairpearl/RIOT,thomaseichinger/RIOT,sgso/RIOT,DipSwitch/RIOT,fnack/RIOT,lazytech-org/RIOT,dailab/RIOT,rfswarm/RIOT,patkan/RIOT,automote/RIOT,syin2/RIOT,ntrtrung/RIOT,Yonezawa-T2/RIOT,rajma996/RIOT,katezilla/RIOT,mtausig/RIOT,dkm/RIOT,neiljay/RIOT,alignan/RIOT,jhollister/RIOT,MarkXYang/RIOT,zhuoshuguo/RIOT,rfuentess/RIOT,thiagohd/RIOT,jasonatran/RIOT,mziegert/RIOT,arvindpdmn/RIOT,cladmi/RIOT,authmillenon/RIOT,LudwigKnuepfer/RIOT,chris-wood/RIOT,JensErdmann/RIOT,hamilton-mote/RIOT-OS,l3nko/RIOT,backenklee/RIOT,LudwigKnuepfer/RIOT,rakendrathapa/RIOT,tdautc19841202/RIOT,wentaoshang/RIOT,haoyangyu/RIOT,backenklee/RIOT,d00616/RIOT,tfar/RIOT,ThanhVic/RIOT,jfischer-phytec-iot/RIOT,bartfaizoltan/RIOT,altairpearl/RIOT,changbiao/RIOT,jferreir/RIOT,lebrush/RIOT,smlng/RIOT,adrianghc/RIOT,JensErdmann/RIOT,Ell-i/RIOT,lebrush/RIOT,plushvoxel/RIOT,dhruvvyas90/RIOT,dailab/RIOT,gebart/RIOT,benoit-canet/RIOT,patkan/RIOT,BytesGalore/RIOT,avmelnikoff/RIOT,marcosalm/RIOT,arvindpdmn/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,FrancescoErmini/RIOT,PSHIVANI/Riot-Code,haoyangyu/RIOT,gautric/RIOT,syin2/RIOT,robixnai/RIOT,ximus/RIOT,automote/RIOT,rajma996/RIOT,rajma996/RIOT,sgso/RIOT,shady33/RIOT,toonst/RIOT,shady33/RIOT,biboc/RIOT,benoit-canet/RIOT,alex1818/RIOT,arvindpdmn/RIOT,Ell-i/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,RBartz/RIOT,shady33/RIOT,latsku/RIOT,phiros/RIOT,kerneltask/RIOT,Josar/RIOT,avmelnikoff/RIOT,koenning/RIOT,josephnoir/RIOT,luciotorre/RIOT,haoyangyu/RIOT,jhollister/RIOT,phiros/RIOT,plushvoxel/RIOT,PSHIVANI/Riot-Code,A-Paul/RIOT,shady33/RIOT,robixnai/RIOT,gautric/RIOT,backenklee/RIOT,jfischer-phytec-iot/RIOT,watr-li/RIOT,MonsterCode8000/RIOT,MohmadAyman/RIOT,jbeyerstedt/RIOT-OTA-update,JensErdmann/RIOT,centurysys/RIOT,jfischer-phytec-iot/RIOT,toonst/RIOT,Darredevil/RIOT,LudwigKnuepfer/RIOT,EmuxEvans/RIOT,kb2ma/RIOT,neiljay/RIOT,sgso/RIOT,rfswarm/RIOT,dkm/RIOT,RIOT-OS/RIOT,khhhh/RIOT,aeneby/RIOT,alignan/RIOT,PSHIVANI/Riot-Code,OTAkeys/RIOT,robixnai/RIOT,rfuentess/RIOT,sumanpanchal/RIOT,kYc0o/RIOT,immesys/RiSyn,neumodisch/RIOT,PSHIVANI/Riot-Code,l3nko/RIOT,watr-li/RIOT,immesys/RiSyn,khhhh/RIOT,abkam07/RIOT,zhuoshuguo/RIOT,asanka-code/RIOT,rakendrathapa/RIOT,brettswann/RIOT,immesys/RiSyn,MarkXYang/RIOT,herrfz/RIOT,ThanhVic/RIOT,altairpearl/RIOT,zhuoshuguo/RIOT,herrfz/RIOT-old,Darredevil/RIOT,lazytech-org/RIOT,haoyangyu/RIOT,jfischer-phytec-iot/RIOT,toonst/RIOT,basilfx/RIOT,abp719/RIOT,alignan/RIOT,MonsterCode8000/RIOT,attdona/RIOT,RBartz/RIOT,gebart/RIOT,LudwigOrtmann/RIOT,openkosmosorg/RIOT,hamilton-mote/RIOT-OS,Hyungsin/RIOT-OS,rakendrathapa/RIOT,authmillenon/RIOT,Osblouf/RIOT,cladmi/RIOT,kaspar030/RIOT,automote/RIOT,mfrey/RIOT,neumodisch/RIOT,kerneltask/RIOT,abp719/RIOT,beurdouche/RIOT,MohmadAyman/RIOT,koenning/RIOT,thiagohd/RIOT,Darredevil/RIOT,jremmert-phytec-iot/RIOT,arvindpdmn/RIOT,lebrush/RIOT,openkosmosorg/RIOT,dailab/RIOT,sumanpanchal/RIOT,kaspar030/RIOT,rfswarm2/RIOT,kb2ma/RIOT,Josar/RIOT,thomaseichinger/RIOT,ThanhVic/RIOT,sgso/RIOT,changbiao/RIOT,basilfx/RIOT,A-Paul/RIOT,koenning/RIOT,MohmadAyman/RIOT,herrfz/RIOT-old,changbiao/RIOT,TobiasFredersdorf/RIOT,ks156/RIOT,avmelnikoff/RIOT,kaleb-himes/RIOT,kYc0o/RIOT,dhruvvyas90/RIOT,mtausig/RIOT,stevenj/RIOT,roberthartung/RIOT,kbumsik/RIOT,malosek/RIOT,jhollister/RIOT,koenning/RIOT,ntrtrung/RIOT,biboc/RIOT,asanka-code/RIOT,khhhh/RIOT,openkosmosorg/RIOT,jferreir/RIOT,jferreir/RIOT,BytesGalore/RIOT,benoit-canet/RIOT,bartfaizoltan/RIOT,d00616/RIOT,alex1818/RIOT,attdona/RIOT,shady33/RIOT,tdautc19841202/RIOT,RubikonAlpha/RIOT,chris-wood/RIOT,alignan/RIOT,RBartz/RIOT,dkm/RIOT,Darredevil/RIOT,cladmi/RIOT,zhuoshuguo/RIOT,watr-li/RIOT,shady33/RIOT,aeneby/RIOT,herrfz/RIOT,josephnoir/RIOT,rfswarm2/RIOT,asanka-code/RIOT,RBartz/RIOT,herrfz/RIOT-old,RIOT-OS/RIOT,koenning/RIOT,mziegert/RIOT,kbumsik/RIOT,thiagohd/RIOT,beurdouche/RIOT,khhhh/RIOT,Ell-i/RIOT,avmelnikoff/RIOT,x3ro/RIOT,gbarnett/RIOT,chris-wood/RIOT,yogo1212/RIOT,ximus/RIOT,alex1818/RIOT,changbiao/RIOT,OlegHahm/RIOT,automote/RIOT,openkosmosorg/RIOT,katezilla/RIOT,lazytech-org/RIOT,l3nko/RIOT,marcosalm/RIOT,adjih/RIOT,ant9000/RIOT,tdautc19841202/RIOT,rfswarm/RIOT,Lexandro92/RIOT-CoAP,OlegHahm/RIOT,rfswarm/RIOT,katezilla/RIOT,syin2/RIOT,changbiao/RIOT,automote/RIOT,dailab/RIOT,herrfz/RIOT,basilfx/RIOT,kb2ma/RIOT,josephnoir/RIOT,jferreir/RIOT,dhruvvyas90/RIOT,RIOT-OS/RIOT,katezilla/RIOT,jhollister/RIOT,jremmert-phytec-iot/RIOT,latsku/RIOT,rfuentess/RIOT,luciotorre/RIOT,rajma996/RIOT,thomaseichinger/RIOT,avmelnikoff/RIOT,x3ro/RIOT,ximus/RIOT,mziegert/RIOT,DipSwitch/RIOT,rajma996/RIOT,EmuxEvans/RIOT,watr-li/RIOT,ntrtrung/RIOT,rfswarm2/RIOT,adrianghc/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,jferreir/RIOT,mtausig/RIOT,malosek/RIOT,TobiasFredersdorf/RIOT,BytesGalore/RIOT,altairpearl/RIOT,MohmadAyman/RIOT,khhhh/RIOT,jbeyerstedt/RIOT-OTA-update,dailab/RIOT,kushalsingh007/RIOT,thiagohd/RIOT,aeneby/RIOT,beurdouche/RIOT,FrancescoErmini/RIOT,ks156/RIOT,dhruvvyas90/RIOT,ntrtrung/RIOT,rajma996/RIOT,biboc/RIOT,miri64/RIOT,kerneltask/RIOT,hamilton-mote/RIOT-OS,Lexandro92/RIOT-CoAP,kushalsingh007/RIOT,arvindpdmn/RIOT,stevenj/RIOT,mziegert/RIOT,PSHIVANI/Riot-Code,fnack/RIOT,Osblouf/RIOT,smlng/RIOT,gbarnett/RIOT,Ell-i/RIOT,gebart/RIOT,brettswann/RIOT,automote/RIOT,latsku/RIOT,RubikonAlpha/RIOT,binarylemon/RIOT,ThanhVic/RIOT,x3ro/RIOT,rfswarm2/RIOT,lazytech-org/RIOT,chris-wood/RIOT,abkam07/RIOT,adrianghc/RIOT,basilfx/RIOT,yogo1212/RIOT,immesys/RiSyn,rousselk/RIOT,kerneltask/RIOT,backenklee/RIOT,robixnai/RIOT,jbeyerstedt/RIOT-OTA-update,daniel-k/RIOT,herrfz/RIOT-old,jremmert-phytec-iot/RIOT,ks156/RIOT,Lexandro92/RIOT-CoAP,ThanhVic/RIOT,koenning/RIOT,wentaoshang/RIOT,kYc0o/RIOT,jasonatran/RIOT,LudwigOrtmann/RIOT,msolters/RIOT,LudwigOrtmann/RIOT,herrfz/RIOT,JensErdmann/RIOT,haoyangyu/RIOT,backenklee/RIOT,msolters/RIOT