Revert "tweak cpufreq table"

This reverts commit 4f383a0ffc226ee2abed7f8c3e92e4722be3b101.
it didn't work well
Revert "add undervolting"

This reverts commit 82353daf38d7356e2996a4e8cd357fecc22ecf02.
It's causing reboots for many people