Add support for relative cpufreq drivers.  Such drivers modulate clock frequency as a percentage of the base rate and do not change the base rate directly.  The cpufreq framework combines these with absolute drivers to produce synthesized levels made of one or more settings.
Add support for relative cpufreq drivers.  Such drivers modulate clock
frequency as a percentage of the base rate and do not change the base
rate directly.  The cpufreq framework combines these with absolute drivers
to produce synthesized levels made of one or more settings.

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