overclocking: initial overclocking for celox boards

raised Max voltage to 1.35 voltes
raised Max OC to 1.72GHz
added L2 Bandwidth boost
modified efuse freq selection to always use my modified fast table

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:

	arch/arm/mach-msm/board-msm8x60_celox.c
overclocking: Add Kconfig option