KGSL: Add a simple GPU governor for Adreno xxx GPU series

initial coding for a Simple GPU governor based on my own work 2 years ago
from Sensation GB kernel commit: c1ea8f64167270d67915b4d4fb00910b1c0f513f

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

Conflicts:
	drivers/gpu/msm/Kconfig
	drivers/gpu/msm/kgsl_pwrscale_trustzone.c
KGSL: Add a simple GPU governor for Adreno xxx GPU series

initial coding for a Simple GPU governor based on my own work 2 years ago
from Sensation GB kernel commit: c1ea8f64167270d67915b4d4fb00910b1c0f513f

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

Conflicts:
	drivers/gpu/msm/Kconfig
	drivers/gpu/msm/kgsl_pwrscale_trustzone.c
KGSL: make simple govenor a selectable option, co-exist with ondemand

also removed some hardcoded values

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

Conflicts:
	drivers/gpu/msm/kgsl_pwrscale_trustzone.c
bfq update,revert simple gov..interactive by default(best for battery and performance)