msm:kgsl: set state as requested state when in NAP
Fix the state to requested state so that when both ISR and
timer fire at the same time, the state is set as SLEEP

Change-Id: Ibeeaa8e586481eef0143f3cdb16bb8273ba2cc80
Signed-off-by: Suman Tatiraju <sumant@codeaurora.org>