ASoC: mediatek: mt8195: add memory-region property

Add a required property "memory-region", which is used to specify memory
for DMA usage.

Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Link: https://lore.kernel.org/r/20211130053905.28470-3-trevor.wu@mediatek.com


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