drm/msm/sde: Set the rotator dev state to active on resume

Set the rotator dev state to active in pm resume as the
dev state is used by generic pm driver for on/off
operations.

Change-Id: I0cde97f2ec2094d7374101719a9efb019bbaa5d8
Signed-off-by: Kalyan Thota <kalyant@codeaurora.org>