dt-bindings: rcar-gen3-phy-usb3: Add bindings for r8a77965

This patch adds bindings for r8a77965 (R-Car M3-N).

Signed-off-by: Yoshihiro Shimoda <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Signed-off-by: Kishon Vijay Abraham I <[e-mail]>

Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb3.txt

···
 	      SoC.
 	      "renesas,r8a7796-usb3-phy" if the device is a part of an R8A7796
 	      SoC.
+	      "renesas,r8a77965-usb3-phy" if the device is a part of an
+	      R8A77965 SoC.
 	      "renesas,rcar-gen3-usb3-phy" for a generic R-Car Gen3 compatible
 	      device.