boards/nucleo-l073: add third UART (USART1) configuration
boards/nucleo-l073: add third UART (USART1) configuration

UART1 definition has been added to the nucleo-l073 board
definition.

Signed-off-by: Aurelien Fillau <b933d430db3ead458ac564385846d9d83f501d8e@gmail.com>

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