msm_fb: display: fix fence fd list be put twice

msm_fb_wait_for_fence() will put fence fd list if sync_fence_wait()
failed. After that same fd list wil be put one more time. This
cause a fd put twice and cause system crash at the time fd
was closed.

Change-Id: If6a358e051c98841e34c23d81098243003ef0836
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>