Without patch you can only compile this kernel source with included SDK binary toolchain (4.6) or for example (maybe simpler) with ubuntu 12.04and installing toolchain (4.6.4) with apt-get install.
Boards:
orangepi plus, olinuxino A20, cubieboard A10, mele A2000 .....
scaling_cur_freq changes constantly...
try to run some cpu intensive program and at the same check scaling_cur_freq, it will go to scaling_max_freq.
Or install CPU frequency applet...
480000 (480MHz) is the minimal CPU freq.
So you reported thermal values when your system was totally idle. BTW: I don't know how it's on H3 but on others sunxi SoCs you only have to query the values of CPU0 since cpufreq settings always apply to all cores.
Would be interesting to "apt-get install stress" and then put significant load on the system: "stress -t 900 -c 4 -m 2 -i 2" (if it survives the 15 min. then your heatsink helps)