ASoC: msm: Avoid multiple release of ocmem memory

Add check to avoid multiple release of same OCMEM buffer,
by checking if the buffer is already freed before. This
is to avoid any system crash due to multiple release of
same buffer.

Change-Id: I527b1e9d502538818d2a15a614b693611c3a6cd9
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>