drivers/sx127x: fix set modem logic
drivers/sx127x: fix set modem logic

yogo1212/RIOT,rfuentess/RIOT,roberthartung/RIOT,authmillenon/RIOT,BytesGalore/RIOT,RIOT-OS/RIOT,neiljay/RIOT,kYc0o/RIOT,avmelnikoff/RIOT,adrianghc/RIOT,biboc/RIOT,BytesGalore/RIOT,biboc/RIOT,josephnoir/RIOT,kbumsik/RIOT,toonst/RIOT,cladmi/RIOT,ks156/RIOT,Josar/RIOT,miri64/RIOT,aeneby/RIOT,authmillenon/RIOT,basilfx/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,smlng/RIOT,x3ro/RIOT,cladmi/RIOT,mfrey/RIOT,neiljay/RIOT,kaspar030/RIOT,beurdouche/RIOT,avmelnikoff/RIOT,immesys/RiSyn,neiljay/RIOT,OlegHahm/RIOT,aeneby/RIOT,hamilton-mote/RIOT-OS,adjih/RIOT,cladmi/RIOT,mfrey/RIOT,jasonatran/RIOT,Josar/RIOT,aeneby/RIOT,OlegHahm/RIOT,x3ro/RIOT,beurdouche/RIOT,LudwigOrtmann/RIOT,josephnoir/RIOT,OTAkeys/RIOT,avmelnikoff/RIOT,x3ro/RIOT,mtausig/RIOT,Josar/RIOT,immesys/RiSyn,yogo1212/RIOT,jasonatran/RIOT,authmillenon/RIOT,ks156/RIOT,avmelnikoff/RIOT,kaspar030/RIOT,BytesGalore/RIOT,kYc0o/RIOT,OlegHahm/RIOT,mtausig/RIOT,A-Paul/RIOT,biboc/RIOT,authmillenon/RIOT,josephnoir/RIOT,LudwigOrtmann/RIOT,kaspar030/RIOT,miri64/RIOT,gebart/RIOT,Josar/RIOT,A-Paul/RIOT,rfuentess/RIOT,neiljay/RIOT,rfuentess/RIOT,LudwigKnuepfer/RIOT,gebart/RIOT,adjih/RIOT,cladmi/RIOT,mtausig/RIOT,beurdouche/RIOT,LudwigKnuepfer/RIOT,adjih/RIOT,aeneby/RIOT,OTAkeys/RIOT,mfrey/RIOT,adrianghc/RIOT,x3ro/RIOT,RIOT-OS/RIOT,lazytech-org/RIOT,roberthartung/RIOT,roberthartung/RIOT,kbumsik/RIOT,immesys/RiSyn,josephnoir/RIOT,ant9000/RIOT,adjih/RIOT,lazytech-org/RIOT,basilfx/RIOT,basilfx/RIOT,mfrey/RIOT,gebart/RIOT,rfuentess/RIOT,aeneby/RIOT,neiljay/RIOT,BytesGalore/RIOT,yogo1212/RIOT,immesys/RiSyn,josephnoir/RIOT,smlng/RIOT,miri64/RIOT,authmillenon/RIOT,cladmi/RIOT,LudwigOrtmann/RIOT,biboc/RIOT,adjih/RIOT,LudwigOrtmann/RIOT,adrianghc/RIOT,x3ro/RIOT,miri64/RIOT,toonst/RIOT,gebart/RIOT,kYc0o/RIOT,OTAkeys/RIOT,LudwigKnuepfer/RIOT,ant9000/RIOT,ks156/RIOT,yogo1212/RIOT,smlng/RIOT,basilfx/RIOT,smlng/RIOT,Josar/RIOT,RIOT-OS/RIOT,immesys/RiSyn,A-Paul/RIOT,kbumsik/RIOT,lazytech-org/RIOT,mtausig/RIOT,ant9000/RIOT,ant9000/RIOT,jasonatran/RIOT,kbumsik/RIOT,miri64/RIOT,beurdouche/RIOT,LudwigKnuepfer/RIOT,avmelnikoff/RIOT,kYc0o/RIOT,adrianghc/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,kbumsik/RIOT,OlegHahm/RIOT,yogo1212/RIOT,mtausig/RIOT,lazytech-org/RIOT,jasonatran/RIOT,toonst/RIOT,A-Paul/RIOT,LudwigKnuepfer/RIOT,immesys/RiSyn,biboc/RIOT,jasonatran/RIOT,lazytech-org/RIOT,kaspar030/RIOT,rfuentess/RIOT,toonst/RIOT,hamilton-mote/RIOT-OS,LudwigOrtmann/RIOT,roberthartung/RIOT,hamilton-mote/RIOT-OS,mfrey/RIOT,kaspar030/RIOT,BytesGalore/RIOT,beurdouche/RIOT,gebart/RIOT,smlng/RIOT,hamilton-mote/RIOT-OS,toonst/RIOT,OTAkeys/RIOT,yogo1212/RIOT,ks156/RIOT,roberthartung/RIOT,OTAkeys/RIOT,basilfx/RIOT,authmillenon/RIOT,ant9000/RIOT,A-Paul/RIOT,hamilton-mote/RIOT-OS,ks156/RIOT,adrianghc/RIOT,LudwigOrtmann/RIOT