Build for Netgear R7800

[hnyman]

@phinn

Wishing my WRT32X had CPU scaling for heat/power efficiency too as it would probably save a couple watts.

You can test my version of the mvebu CPU frequency scaling driver:

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…