dt-bindings: dma: mtk-apdma: add bindings for MT8516 SOC

Add bindings to APDMA for MT8516 SoC. MT8516 is compatible with MT6577.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201209114736.70625-1-fparent@baylibre.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>