Downclock when idle

[mk01]

@f1vefour

arm_freq_min is by default set to 700. arm_freq is by default the same value. by changing arm_freq to higher number arm_freq_min is not changed.
frequencies is not changing FW but kernel alone. and if arm_clock is not going back to arm_freq_min is caused only by performance governor which is active by default. changing it to ondemand (or powersave) allows the clock to go down to arm_freq_min.

arm_freq_min can be set also to lower value from default 700. and again arm will lower the freq only if governor is changed.
(just a wrap-up that there is no confusion of any kind)