elevator: Add elevator_queue_empty_fn

Conflicts:
	include/linux/elevator.h
sioplus-iosched: tuning for performance
powersuspend: new pm kernel driver for android w/o early_suspend

Android early_suspend/late_resume PM kernel driver framework has been
deprecated by Google. This new powersuspend PM kernel driver is a replacement
for it and existing early_suspend drivers can be easily adapted to use this
new replacement driver

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

powersuspend: fix logci derps :p

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

Conflicts:
	kernel/power/Makefile
powersuspend: change workqueue structure for coexist with old logic