defconfig: disable ondemand governor
cpu_boost: derp remove duplicate definitions
retain_cpu_freq: Rename to retain_cpu_policy
 retain_cpu_policy: Add a fail-safe

   Deliberately NULLify variables if things are failing,
   so that the checks will catch it.
cpufreq: Add conditions for when retain_cpu_policy is disabled
cpu_boost: Apply retain_cpu_policy logic to boosts