esp_now: remove unnecessary ifdef
esp_now: remove unnecessary ifdef

jasonatran/RIOT,rfuentess/RIOT,BytesGalore/RIOT,toonst/RIOT,kYc0o/RIOT,yogo1212/RIOT,smlng/RIOT,basilfx/RIOT,ant9000/RIOT,yogo1212/RIOT,josephnoir/RIOT,OTAkeys/RIOT,mtausig/RIOT,aeneby/RIOT,lazytech-org/RIOT,x3ro/RIOT,miri64/RIOT,mfrey/RIOT,rfuentess/RIOT,smlng/RIOT,lazytech-org/RIOT,BytesGalore/RIOT,smlng/RIOT,jasonatran/RIOT,rfuentess/RIOT,x3ro/RIOT,BytesGalore/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,ant9000/RIOT,x3ro/RIOT,yogo1212/RIOT,kaspar030/RIOT,kaspar030/RIOT,josephnoir/RIOT,cladmi/RIOT,miri64/RIOT,smlng/RIOT,ant9000/RIOT,lazytech-org/RIOT,x3ro/RIOT,OTAkeys/RIOT,ant9000/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,BytesGalore/RIOT,OlegHahm/RIOT,cladmi/RIOT,aeneby/RIOT,kYc0o/RIOT,miri64/RIOT,toonst/RIOT,yogo1212/RIOT,kaspar030/RIOT,mtausig/RIOT,mfrey/RIOT,BytesGalore/RIOT,lazytech-org/RIOT,kaspar030/RIOT,mfrey/RIOT,authmillenon/RIOT,yogo1212/RIOT,authmillenon/RIOT,OTAkeys/RIOT,mtausig/RIOT,josephnoir/RIOT,authmillenon/RIOT,cladmi/RIOT,basilfx/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,A-Paul/RIOT,toonst/RIOT,josephnoir/RIOT,authmillenon/RIOT,A-Paul/RIOT,jasonatran/RIOT,miri64/RIOT,RIOT-OS/RIOT,aeneby/RIOT,jasonatran/RIOT,OTAkeys/RIOT,authmillenon/RIOT,yogo1212/RIOT,kYc0o/RIOT,kaspar030/RIOT,mfrey/RIOT,aeneby/RIOT,cladmi/RIOT,miri64/RIOT,josephnoir/RIOT,RIOT-OS/RIOT,A-Paul/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,basilfx/RIOT,mtausig/RIOT,basilfx/RIOT,kYc0o/RIOT,toonst/RIOT,cladmi/RIOT,mtausig/RIOT,A-Paul/RIOT,basilfx/RIOT,smlng/RIOT,OlegHahm/RIOT,aeneby/RIOT,A-Paul/RIOT,rfuentess/RIOT,mfrey/RIOT,authmillenon/RIOT,toonst/RIOT,ant9000/RIOT,lazytech-org/RIOT,kYc0o/RIOT,x3ro/RIOT,OlegHahm/RIOT