overclocking: initial MSM S4-pro overclocking to 1.836 GHz

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

Conflicts:
	arch/arm/mach-msm/acpuclock-krait.c
	arch/arm/mach-msm/lge/mako/board-mako.c

Change-Id: I4b797401eb0303a1f6ffdf6cb7b6e6ed4308dad7