msm:ais: Remove recursive locks

We are trying to acquire the same mutex lock twice
in iotcl path and axi/stats start stream.
Removed recursive locks.

Change-Id: I331f79e5a387aa64600656f6377ba46385d11a83
Signed-off-by: Suprith Malligere Shankaregowda <supgow@codeaurora.org>