cpufreq: Added Wheatley governor

Credits to Ezekeel

Conflicts:

	drivers/cpufreq/Kconfig
	drivers/cpufreq/Makefile
	include/linux/cpufreq.h

	modified:   drivers/cpufreq/Kconfig
	modified:   drivers/cpufreq/Makefile
	new file:   drivers/cpufreq/cpufreq_wheatley.c
	modified:   include/linux/cpufreq.h