msm: vidc: Call vb2_queue_release before destroying reg_buf lock

vb2_queue_release could call  buf_cleanup which acquires registered
_buf lock. Hence call queue release before destroying the lock.

CRs-Fixed: 2044665
Change-Id: I512ba96eec91e484c885ad2ec3614b6348727e60
Signed-off-by: Abdulla Anam <abdullahanam@codeaurora.org>