qseecom: Fix issue with incomplete command exiting prematurely

A process waiting on a signal can be awaken by any signal. We
need to only continue processing when the condition of the
wait event is met.

Change-Id: Ib2102babbb505876f89b04399729e6ff5a475605
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>
Signed-off-by: Praveen Chavan <pchavan@codeaurora.org>
Merge remote-tracking branch 'aosp/android-msm-flo-3.4-jb-mr2' into somex-4.3