msm: sde: send wake event after retiring rotator request

Wake event is sent before rotator request is removed
from pending list, and stream off handler may end up
waiting for full timeout period as a result of failing
the pending request check. Add wake event signal after
rotator request is detached from pending list to ensure
streamoff handler will exit properly.

Change-Id: I8b10faa78787d9f94a32f293faffe49ef690c362
Signed-off-by: Alan Kwong <akwong@codeaurora.org>