Revert "mach-tegra: cpu: several changes, see commit msg"

This reverts commit 693490ed33e8e9cd4d312c5bba126d41110f8028.

Conflicts:
	arch/arm/mach-tegra/board-grouper-power.c
	arch/arm/mach-tegra/edp.c
	arch/arm/mach-tegra/tegra_pmqos.h
	drivers/cpufreq/cpufreq_ondemand.c