[SOLVED] change default cpu governor

Hello, I'm new to libreelec having a setup on a Odroid C2 for some days now. I also have some linux experience..
I have the C2 in the standard plasic case and idle temperatures between 60 and 70 °C which is kind of hot I think. Under load it goes up another 10 °C .
Anyway I see that the default cpu governor is "performance" which doesn't feel right to me, especially seeing these thermal values. I'd like to try "ondemand" and maybe some others to compare performance and temperatures. I know this is possible with a simple echo, but what I like also is an option to make changes permanent to the system.
I tried to change boot.ini

setenv maxcpus "4"
setenv max_freq "1536"
setenv governor "ondemand"


#------------------------------------------------------------------------------------------------------
#
# Odroid C2 specific
#
#------------------------------------------------------------------------------------------------------
setenv odroidp1 "no_console_suspend logo=${logoopt} vout=${outputmode},enable hdmimode=${hdmimode} cvbsmode=nocvbs"
setenv odroidp2 "mac=${ethaddr} consoleblank=0 max_freq=${max_freq} maxcpus=${maxcpus} governor=${governor}"
setenv odroid   "${odroidp1} ${odroidp2}"

But the kernel doesn't seem to accept these parameters. Is there another way to do this?
Is there any reason to run on "performance" governor for libreelec developers?

Thanks!
[hr]
found a way myself via

/storage/.config/autostart.sh:

echo ondemand | tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor >/dev/null

for ondemand governor in this case.