msm: vidc: disable decode batching feature

This feature implemented for power optimization
with OMX but not well compliant with Codec 2.0.
Disable it to unblock VT frame drop issue.

Bug: 144588940
test: VT frame drop
Change-Id: Ic2e46d3b6b5a449076ae91006d432a038fb03791
Signed-off-by: Wen Chang Liu <wenchangliu@google.com>