Revert " cpufreq: interactive: Remove unnecessary cpu_online() check"

This reverts commit 1bb2d825ee0b657ecb929dc81b84052189012df9.
Revert "cpufreq: interactive: fix race on governor start/stop"

This reverts commit 28a2084e1fa72691abd99a0f675e81fe3bd189bf.
zimage that works (SmittyV)