Sync Interactive governor with Android 3.4 upstream

Adjusted get_cpu_idle_time_jiffy() to work on 3.0 kernel

Conflicts:
	Documentation/cpu-freq/governors.txt
	drivers/cpufreq/cpufreq_interactive.c

Conflicts:
	Documentation/cpu-freq/governors.txt
	drivers/cpufreq/cpufreq_interactive.c