dt-bindings: dma: mediatek,uart-dma: Support all SoC generations

dt-bindings: dma: mediatek,uart-dma: Support all SoC generations

Add support for the APDMA IP found in all of the SoC generations
that are currently supported upstream; this includes:
 - MT8173, MT8183, fully compatible with MT6577 (32-bits)
 - MT7988, MT8186, MT8188, MT8192, MT8195 and MT6835 (34-bits)
 - MT6991, MT8196 and MT6985 (35-bits)

...where:
 - MT6835 is the first SoC where the AP_DMA IP supports 34-bits
   addressing; and
 - MT6985 is the first SoC where the AP_DMA IP supports 35-bits
   addressing.

While at it, also add myself in the maintainers list.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20251113122229.23998-4-angelogioacchino.delregno@collabora.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>