msm: ADSPRPC: Check for proper pending close operation

The condition used to ensure that there are no pending clean up
operations on going was matched against the incorrect condition
causing the event to be triggered right away.

Change-Id: Iade65145396afdd48a7d480c1b01db8835949625
Acked-by: Chenna Kesava Raju <chennak@qti.qualcomm.com>
Signed-off-by: Sathish Ambley <sathishambley@codeaurora.org>