cpu: saml21: re-add periph/pm initialization
cpu: saml21: re-add periph/pm initialization

miri64/RIOT,yogo1212/RIOT,roberthartung/RIOT,hamilton-mote/RIOT-OS,kbumsik/RIOT,adjih/RIOT,authmillenon/RIOT,dailab/RIOT,RIOT-OS/RIOT,kb2ma/RIOT,backenklee/RIOT,mfrey/RIOT,A-Paul/RIOT,OlegHahm/RIOT,kb2ma/RIOT,RIOT-OS/RIOT,katezilla/RIOT,kerneltask/RIOT,immesys/RiSyn,BytesGalore/RIOT,lazytech-org/RIOT,ant9000/RIOT,mtausig/RIOT,Ell-i/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,kYc0o/RIOT,katezilla/RIOT,basilfx/RIOT,avmelnikoff/RIOT,miri64/RIOT,gebart/RIOT,josephnoir/RIOT,kaleb-himes/RIOT,adrianghc/RIOT,basilfx/RIOT,dailab/RIOT,biboc/RIOT,aeneby/RIOT,immesys/RiSyn,mfrey/RIOT,basilfx/RIOT,OlegHahm/RIOT,basilfx/RIOT,kaleb-himes/RIOT,toonst/RIOT,aeneby/RIOT,OlegHahm/RIOT,jasonatran/RIOT,TobiasFredersdorf/RIOT,Josar/RIOT,yogo1212/RIOT,kaspar030/RIOT,backenklee/RIOT,gautric/RIOT,aeneby/RIOT,syin2/RIOT,smlng/RIOT,neiljay/RIOT,rfuentess/RIOT,gautric/RIOT,smlng/RIOT,TobiasFredersdorf/RIOT,OTAkeys/RIOT,backenklee/RIOT,kYc0o/RIOT,ks156/RIOT,immesys/RiSyn,kaspar030/RIOT,authmillenon/RIOT,ks156/RIOT,kaleb-himes/RIOT,TobiasFredersdorf/RIOT,kbumsik/RIOT,hamilton-mote/RIOT-OS,biboc/RIOT,mtausig/RIOT,kb2ma/RIOT,thomaseichinger/RIOT,smlng/RIOT,LudwigOrtmann/RIOT,syin2/RIOT,cladmi/RIOT,immesys/RiSyn,beurdouche/RIOT,plushvoxel/RIOT,jbeyerstedt/RIOT-OTA-update,neumodisch/RIOT,A-Paul/RIOT,syin2/RIOT,kerneltask/RIOT,TobiasFredersdorf/RIOT,A-Paul/RIOT,adjih/RIOT,lazytech-org/RIOT,miri64/RIOT,kb2ma/RIOT,kbumsik/RIOT,josephnoir/RIOT,adrianghc/RIOT,ks156/RIOT,kaspar030/RIOT,neiljay/RIOT,jfischer-phytec-iot/RIOT,ant9000/RIOT,dkm/RIOT,katezilla/RIOT,dkm/RIOT,jasonatran/RIOT,jbeyerstedt/RIOT-OTA-update,biboc/RIOT,yogo1212/RIOT,kYc0o/RIOT,lazytech-org/RIOT,LudwigOrtmann/RIOT,Ell-i/RIOT,avmelnikoff/RIOT,Ell-i/RIOT,adjih/RIOT,aeneby/RIOT,beurdouche/RIOT,ks156/RIOT,cladmi/RIOT,BytesGalore/RIOT,kaspar030/RIOT,BytesGalore/RIOT,Hyungsin/RIOT-OS,kerneltask/RIOT,Hyungsin/RIOT-OS,kbumsik/RIOT,x3ro/RIOT,thomaseichinger/RIOT,LudwigKnuepfer/RIOT,jasonatran/RIOT,backenklee/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,jfischer-phytec-iot/RIOT,katezilla/RIOT,dailab/RIOT,rfuentess/RIOT,Josar/RIOT,toonst/RIOT,kerneltask/RIOT,dkm/RIOT,neiljay/RIOT,BytesGalore/RIOT,LudwigOrtmann/RIOT,lazytech-org/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,avmelnikoff/RIOT,kbumsik/RIOT,aeneby/RIOT,kerneltask/RIOT,LudwigKnuepfer/RIOT,roberthartung/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,plushvoxel/RIOT,jfischer-phytec-iot/RIOT,adrianghc/RIOT,hamilton-mote/RIOT-OS,neumodisch/RIOT,gebart/RIOT,Hyungsin/RIOT-OS,avmelnikoff/RIOT,miri64/RIOT,dailab/RIOT,kb2ma/RIOT,adrianghc/RIOT,backenklee/RIOT,authmillenon/RIOT,plushvoxel/RIOT,adrianghc/RIOT,thomaseichinger/RIOT,mfrey/RIOT,x3ro/RIOT,x3ro/RIOT,authmillenon/RIOT,katezilla/RIOT,dkm/RIOT,jfischer-phytec-iot/RIOT,neiljay/RIOT,OlegHahm/RIOT,beurdouche/RIOT,Hyungsin/RIOT-OS,immesys/RiSyn,roberthartung/RIOT,gebart/RIOT,ant9000/RIOT,thomaseichinger/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,jasonatran/RIOT,cladmi/RIOT,miri64/RIOT,roberthartung/RIOT,authmillenon/RIOT,jbeyerstedt/RIOT-OTA-update,neumodisch/RIOT,josephnoir/RIOT,RIOT-OS/RIOT,rfuentess/RIOT,kaleb-himes/RIOT,jbeyerstedt/RIOT-OTA-update,Ell-i/RIOT,A-Paul/RIOT,ant9000/RIOT,LudwigOrtmann/RIOT,LudwigKnuepfer/RIOT,dkm/RIOT,x3ro/RIOT,yogo1212/RIOT,LudwigOrtmann/RIOT,dailab/RIOT,ks156/RIOT,TobiasFredersdorf/RIOT,kYc0o/RIOT,OTAkeys/RIOT,biboc/RIOT,biboc/RIOT,yogo1212/RIOT,A-Paul/RIOT,jbeyerstedt/RIOT-OTA-update,mtausig/RIOT,LudwigKnuepfer/RIOT,plushvoxel/RIOT,mtausig/RIOT,smlng/RIOT,adjih/RIOT,immesys/RiSyn,yogo1212/RIOT,neumodisch/RIOT,lazytech-org/RIOT,Ell-i/RIOT,smlng/RIOT,Josar/RIOT,josephnoir/RIOT,plushvoxel/RIOT,ant9000/RIOT,gebart/RIOT,rfuentess/RIOT,BytesGalore/RIOT,roberthartung/RIOT,kaspar030/RIOT,OTAkeys/RIOT,toonst/RIOT,LudwigOrtmann/RIOT,gautric/RIOT,kYc0o/RIOT,mtausig/RIOT,neumodisch/RIOT,jfischer-phytec-iot/RIOT,thomaseichinger/RIOT,OTAkeys/RIOT,syin2/RIOT,mfrey/RIOT,gautric/RIOT,beurdouche/RIOT,mfrey/RIOT,hamilton-mote/RIOT-OS,avmelnikoff/RIOT,cladmi/RIOT,Josar/RIOT,hamilton-mote/RIOT-OS,kaleb-himes/RIOT,basilfx/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,beurdouche/RIOT,RIOT-OS/RIOT,gautric/RIOT,neumodisch/RIOT,gebart/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,Josar/RIOT,jasonatran/RIOT,adjih/RIOT,cladmi/RIOT,toonst/RIOT,x3ro/RIOT,syin2/RIOT,toonst/RIOT,LudwigKnuepfer/RIOT,rfuentess/RIOT,neiljay/RIOT,Hyungsin/RIOT-OS,josephnoir/RIOT