added overclock upto 2.5GHz

Conflicts:
	arch/arm/mach-msm/acpuclock-krait.c
decouple overclock & CPU bin selection

Conflicts:
	arch/arm/mach-msm/Kconfig
add dependency for OC Ultimate
overclock only upto 2.3GHz till, scaling to max speed when CPU online, is fixed

Conflicts:
	arch/arm/configs/honami_defconfig
Made 2.5 OC Ultimate work better
Credit: DoomLord