dt-bindings: usb: sunxi-musb: Add Allwinner D1 compatible

The MUSB controller in the Allwinner D1 has 10 endpoints, making it
compatible with the A33 variant of the hardware.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220702195249.54160-2-samuel@sholland.org