* The defconfigs from the RPi Kernel set `powersave` as the default
CPU governor, which is a bad idea as that reduces performance by
setting the CPU frequency to the minimum one.
* In case of a Yocto build user-space is not configured by default
to change the CPU governor, so `powersave` will remain the CPU
governor and it will slow down everything.
* I submitted a fix for those defconfigs to upstream here:
https://github.com/raspberrypi/linux/pull/5666
However, we shouldn't wait until that is accepted and backported
to all the stable branches (if ever is).
* This patch unsets the selection of `powersave` as the default CPU
governor.
* Then the CPU governor that will be selected as default after this
patch will be the Linux's default one that is either `ondemand` or
`schedutil` depending on the Kernel version.
Signed-off-by: Carlos Alberto Lopez Perez <clopez@igalia.com>