drivers/gpu/pvr/pvr_governor: add and enable PVR GPU governor
boype: left out the sysfs interface for current GPU frequency since we already have another one

this simple PVR GPU governor will scale between 3 speeds:
  idle -- GPU not active
  nominal -- GPU active with low graphical load
  turbo -- GPU active and boosted to max frequency

This should further save battery by intelligently selecting GPU frequency
based on GPU loading.

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

drivers/gpu/pvr/pvr_governor: add sysfs entry to switch governor type

0 - "performance" ==> always return system turbo speed
1 - "ondemand" ==> return based on GPU loading (by default "ondemand"
governor is active)

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

drivers/gpu/pvr/pvr_governor: add "powersave" governor as another option

    0 - "performance" ==> always return system turbo speed
    1 - "ondemand" ==> return based on GPU loading (by default "ondemand"
                       governor is active)
    2 - "powersave" ==> run alway at nominal speed

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

drivers/gpu/pvr/pvr_governor: fix sysfs to show "powersave" governor

Signed-off-by: Paul Reioux <reioux@gmail.com>
Adjust GPU OC and GPU governor interfaces to function properly with each other

Conflicts:
	arch/arm/mach-omap2/omap2plus-cpufreq.c
	arch/arm/mach-omap2/opp4xxx_data.c
	include/linux/cpufreq.h
Fixed bootloop caused by the combination of removed CPU/IVA->CORE dependencies and custom voltage
drivers/gpu/pvr/pvr_governor: add sysfs interface for current GPU freqeuncy

Signed-off-by: Paul Reioux <reioux@gmail.com>
arch:arm:mach-omap2: fix gpu 384 voltage values.