dt-bindings: usb: renesas,usb3-peri: add r8a77961 support

This patch adds support for r8a77961 (R-Car M3-W+).
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

Documentation/devicetree/bindings/usb/renesas,usb3-peri.yaml

@@ -18,6 +18,7 @@ properties:
           - renesas,r8a774c0-usb3-peri # RZ/G2E
           - renesas,r8a7795-usb3-peri  # R-Car H3
           - renesas,r8a7796-usb3-peri  # R-Car M3-W
+          - renesas,r8a77961-usb3-peri # R-Car M3-W+
           - renesas,r8a77965-usb3-peri # R-Car M3-N
           - renesas,r8a77990-usb3-peri # R-Car E3
       - const: renesas,rcar-gen3-usb3-peri