msm: synx: separate lock for bind table

Change provides a separate lock for the bind table.
Using table lock can lead to deadlock while cleaning
unreleased synx objects with external fence bound
that are in ACTIVE state. Providing separate lock
elimates deadlock caused for the scenario.

Change-Id: I1097c540aadfdadfb2e0ae07705346ecc38c50d2
Signed-off-by: Sumukh Hallymysore Ravindra <shallymy@codeaurora.org>