asoc: msm-compress: Add lock in controls _put() and _get() callback

asoc: msm-compress: Add lock in controls _put() and _get() callback

Few mixer controls _put and _get methods uses runtime private data
that can be freed by close() callback in parallel threads leading
to issue. Added global mutex lock in such methods to avoid runtime
concurrency around such data.

Change-Id: Ie542c64a4f1e50fd9547ebb9f65df2b7b0c21a0e
Signed-off-by: Ajit Pandey <ajitp@codeaurora.org>
Signed-off-by: Jhansi Konathala <cjkonat@codeaurora.org>