This patch does the following:

- Fixes the omap_pm_idle() code so that we enter WFI mode in idle.
- /sys/power/sleep_while_idle is created only when 32k timer is used
Signed-off-by: NVivek Kutal <vivek.kutal@celunite.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>