cpufreq: ondemand: Add Graphics boost. Remove CPU_FREQ_GOV_ONDEMAND_2_PHASE.

porting latest patches from https://github.com/flar2/m7-GPE/commits/ElementalX-Sense/drivers/cpufreq/cpufreq_ondemand.c (Mar 09, 2014)

Conflicts:
	arch/arm/mach-msm/board-k2_u.c
	drivers/cpufreq/Kconfig
	drivers/cpufreq/cpufreq_intellidemand.c