dt-bindings: usb: generic-ehci: Add Allwinner D1 compatible

The Allwinner D1 contains USB controllers which claim to be compatible
with the EHCI specification version 1.0.
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/20220702195249.54160-3-samuel@sholland.org

Documentation/devicetree/bindings/usb/generic-ehci.yaml

@@ -38,6 +38,7 @@ properties:
               - allwinner,sun8i-h3-ehci
               - allwinner,sun8i-r40-ehci
               - allwinner,sun9i-a80-ehci
+              - allwinner,sun20i-d1-ehci
               - aspeed,ast2400-ehci
               - aspeed,ast2500-ehci
               - aspeed,ast2600-ehci