ASoC: msm: qdsp6v2: Fix for cmd status overwrite

There is a race condition between offload callback thread
and HAL thread which can cause an eos ack notification to
be overwritten by a stop command request. Fix this by
using separate status vars for commands originating from
different thread contexts

Change-Id: I87dc0e34f4c50d48a25f4d7eaccd876b2ae827f0
Signed-off-by: Haynes Mathew George <hgeorge@codeaurora.org>