libmix: refine code with libva rebase in HW JPEG

BZ: 99978

refine code with libva rebase in HW JPEG for data
structure rename

Change-Id: I660a2123d562159847dd51750358d3b08af7c28a
Signed-off-by: Nana GUo <nana.n.guo@intel.com>
Reviewed-on: http://android.intel.com:8080/101683
Reviewed-by: cactus <cactus@intel.com>
Reviewed-by: Shi, PingX <pingx.shi@intel.com>
Tested-by: Shi, PingX <pingx.shi@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
2 files changed