there are multiple ways of doing this, i went down the route of blackisting meson-ir using this simple bit of bash (put in /storage/.config/autostart.sh) :-
# disable 'meson-ir' (odroid built in ir reciever), we use the much better 'mceusb' (microsoft ir reciever)
if [ ! -f /storage/.config/modprobe.d/disable-meson-ir.conf ]; then
echo "blacklist meson-ir" > /storage/.config/modprobe.d/disable-meson-ir.conf
fi
see here for other options:- Disable Odroid built-in IR receiver
edit - would of been nice to have this as an option in the Kodi UI via CoreELEC ‘services’ where you could toggle it on/off, maybe a feature request?