GPU Overclock: initial GPU overclocking to 487.5 MHz

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

Conflicts:
	arch/arm/mach-msm/Kconfig
CPU OVERCLOCK: add ultimate option for 2.1 GHz, normal default to 1.9 GHz

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

Conflicts:
	arch/arm/mach-msm/acpuclock-8064.c