Build for WNDR3700v1/v2 / WNDR3800 (discontinued)

[hnyman]

I get lost why you ask that mvebu question here in the WNDR3700 build thread?
I wanted to see in 2017 if mvebu WRT3200ACM benefits from CPU frequency scaling as that seemed to work with ipq806x R7800. I have since then carried the patch in my WRT3200ACM build.

Discussion related to that is in

CPU frequency scaling driver for mvebu (WRT3200ACM etc.)

I have been wondering why no proper CPU frequency scaling driver has been implemented for WRT3200ACM (and WRT1900ACS etc.) and the other mvebu devices. Apparently no such driver has been accepted upstream in Linux, but luckily there is one RFC version of a driver, which has been published in 2015. I noticed that the driver has recently been implemented for Turris Omnia (running an Openwrt derivative with kernel 4.4 for mvebu), so I decided to test if the driver could be modified to work with ke…