cpu/esp32: fixes serious memory leak in esp_wifi
cpu/esp32: fixes serious memory leak in esp_wifi

The buffer given by the WiFi driver as parameter eb has to be freed explicitly. Otherwise the esp_wifi_netdev stops working after some seconds.

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