msm: camera: Fix race condition between camera driver and camera daemon

Delete checking command list before calling
wait_for_competion_timeout which could cause race condtion
if camera daemon may respond fast and there is one context swtich
between msm_enqueue and completion.

Change-Id: I28bdc4e344d2365acf49d422ba75dc64308a96aa
Signed-off-by: Yiduo Wang <yiduow@codeaurora.org>