misc: cec: cancel workqueue in suspend

misc: cec: cancel workqueue in suspend

cancel the workqueue in suspend method before turning
  off the clock

Bug 1360341

Change-Id: I126da686a6ba0c5eec55b67df1e9f962ce16fc48
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/280159
(cherry picked from commit 7cc6da6e41c7889f7ed8da7833d293b3b884bc0e)
Signed-off-by: Xia Yang <xiay@nvidia.com>
Reviewed-on: http://git-master/r/346041
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>