GPU: Add 500 Mhtz to freq table.

Add 500 Mhtz to list of clock speeds. Choose 450 Mhtz as default and scale as
required

Conflicts:
	arch/arm/mach-msm/include/mach/kgsl.h
GPU: Bump high freq to 533Mhtz

Change-Id: Id69b363a7781f90bfbdcf7b51a6c7537cbdb26a3

Conflicts:
	Makefile
GPU: Tweak GPU scaling low/med/high values

Change-Id: I0e4c7631e76df52ed761f5cf06bff0b05a5deb0e
GPU: Revert tweaks to GPU Governing

Change-Id: I148a18e36b6fd95a0e65537951fe9e875c3a47fb
Tweak GPU OC to try and save some battery and get better performance

Change-Id: Ib19159d6dfeb605234be633df3ec3b167fd9cf08