ASoC: mediatek: mt8195: add playback support to PCM1_BE dai_link

PCM1_BE should be a dai_link for both playback and capture.
In the patch, the missing DPCM playback support is added.

Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Link: https://lore.kernel.org/r/20211230084731.31372-3-trevor.wu@mediatek.com


Signed-off-by: Mark Brown <broonie@kernel.org>