msm: sde: Wait for Rotator HW complete if stop streaming timeout

SDE rotator commit handler is running under workqueue, and it is
possible that it gets blocked longer than the expected timeout setting
in fence timeout and stream stop timeout. In the case of stream stop
wait timeout, it is important to wait for the rotator commit handler
finished by issuing a cancel request, to ensure buffer resources are
safe to release in the V4L2 framework.

CRs-Fixed: 2013724
Change-Id: I40bbbd8072bf6d0bf1f0d61cc1668a431b12f707
Signed-off-by: Benjamin Chan <bkchan@codeaurora.org>