drm/msm: handle rsc jitter time based on rsc state

This change adds state parameter to rsc timer calculations.
If state is in command mode, factor jitter time into static
wakeup time. In all other states, do not take jitter
into consideration.

Change-Id: I83b96a83cdf66556cf61130cd2ad2036fe3a24be
Signed-off-by: Samantha Tran <samtran@codeaurora.org>