boards/esp32-wroom-32: don't export _PARAM_DEFINED variables
boards/esp32-wroom-32: don't export _PARAM_DEFINED variables

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