cpu/esp32: several small doc fixes
cpu/esp32: several small doc fixes


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