drm/mediatek: mtk_dpi: Rename output fmts array for MT8195 DP_INTF

drm/mediatek: mtk_dpi: Rename output fmts array for MT8195 DP_INTF

For the sake of increasing human readability and avoid possible
confusion between DPI and DP_INTF output formats (as the two are
ever so slightly different), rename the mt8195_output_fmts array
to mt8195_dp_intf_output_fmts.

This commit brings no functional changes.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20250409131306.108635-6-angelogioacchino.delregno@collabora.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>