Merge branch 'dev/p/fp2/sec_bringup' into int/p/fp2

* dev/p/fp2/sec_bringup:
  mm-video-v4l2: venc: Use client allocated memory if available
  mm-video-v4l2: venc: Avoid buffer access after free.
  mm-video-v4l2: Avoid buffer access after free buffer call
  mm-video-v4l2: Protect buffer lifecycle with lock

Issue: FP2P-180
Change-Id: I7dcf97fcd4af28fc382102bc1ac163eb864d5a4d