drm/mediatek: dsi: Compress of_device_id entries and add sentinel

All entries fit in 82 columns, which is acceptable: compress all of
the mtk_dsi_of_match[] entries to a single line for each.

While at it, also add the usual sentinel comment to the last entry.

Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
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/20240215085316.56835-9-angelogioacchino.delregno@collabora.com/


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