arm64: dts: allwinner: a64: Add DPHY interrupt

The DPHY has an interrupt line which is shared with the DSI controller.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20221114022113.31694-4-samuel@sholland.org


Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>