msm: vidc: Change all spinlocks to mutexes

Change all spinlocks to mutexes so that the
leaf level functions can use mutex.

Change-Id: I49cbc76cf10a0609f8403a3998b63c1313a7491d
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>
8 files changed