@SkewedZeppelin would like to thank you for your help, now have builds working lovely.
Currently running:
OpenWrt SNAPSHOT r15241+5-3ab695368a
Kernel Version 5.4.83
With CPU Frequency scaling enabled and working very well.
Update:
Firmware Version OpenWrt SNAPSHOT r15371+5-7e4585e593 / LuCI Master git-20.348.36293-4843841
Kernel Version 5.4.85
On WRT32X with CPU Frequency working very well using the following settings
echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo ondemand > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo 933000 > /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq
echo 933000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
echo 30 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold
echo 10 > /sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor