tests: fix enumeration type usage in driver_sx127x
tests: fix enumeration type usage in driver_sx127x


kYc0o/RIOT,jasonatran/RIOT,kaspar030/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,smlng/RIOT,yogo1212/RIOT,basilfx/RIOT,kYc0o/RIOT,ant9000/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,smlng/RIOT,basilfx/RIOT,kYc0o/RIOT,smlng/RIOT,kYc0o/RIOT,kaspar030/RIOT,smlng/RIOT,authmillenon/RIOT,yogo1212/RIOT,miri64/RIOT,ant9000/RIOT,miri64/RIOT,ant9000/RIOT,yogo1212/RIOT,authmillenon/RIOT,jasonatran/RIOT,authmillenon/RIOT,jasonatran/RIOT,basilfx/RIOT,basilfx/RIOT,OlegHahm/RIOT,basilfx/RIOT,OlegHahm/RIOT,jasonatran/RIOT,authmillenon/RIOT,OlegHahm/RIOT,kaspar030/RIOT,kYc0o/RIOT,miri64/RIOT,OTAkeys/RIOT,yogo1212/RIOT,jasonatran/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,smlng/RIOT,yogo1212/RIOT,miri64/RIOT,authmillenon/RIOT,OlegHahm/RIOT,miri64/RIOT,OTAkeys/RIOT,yogo1212/RIOT,OTAkeys/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,ant9000/RIOT,ant9000/RIOT