drm/mediatek: dp: Add the audio packet flag to mtk_dp_data struct

The audio packet arrangement function is to only arrange audio
packets into the Hblanking area. In order to align with the HW
default setting of mt8195, this function needs to be turned off.

Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20230822024155.26670-3-shuijing.li@mediatek.com/


Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>