dt-bindings: usb: Add V3s compatible string for EHCI

The Allwinner V3s uses a generic EHCI and OHCI for USB host
communication and the MUSB controller for OTG mode. Add compatible
strings for the EHCI node.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230828181941.1609894-5-macroalpha82@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>

Author: macromorgan

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

@@ -38,6 +38,7 @@ properties:
               - allwinner,sun8i-a83t-ehci
               - allwinner,sun8i-h3-ehci
               - allwinner,sun8i-r40-ehci
+              - allwinner,sun8i-v3s-ehci
               - allwinner,sun9i-a80-ehci
               - allwinner,sun20i-d1-ehci
               - aspeed,ast2400-ehci