msm: kgsl: no need to cast long because jiffies and window_time are already long.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Revert "ARM: kernel: update cpu_suspend code to use cache LoUIS operations"

This reverts commit 97d19eeac5185319c4f595ae0a460ff456344f0a.