dt-bindings: display: bridge: renesas,lvds: RZ/G2E needs renesas,companion too

Document RZ/G2E support for property renesas,companion.
Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

Documentation/devicetree/bindings/display/bridge/renesas,lvds.yaml

@@ -83,9 +83,9 @@ properties:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
       phandle to the companion LVDS encoder. This property is mandatory
-      for the first LVDS encoder on D3 and E3 SoCs, and shall point to
-      the second encoder to be used as a companion in dual-link mode. It
-      shall not be set for any other LVDS encoder.
+      for the first LVDS encoder on R-Car D3 and E3, and RZ/G2E SoCs, and shall
+      point to the second encoder to be used as a companion in dual-link mode.
+      It shall not be set for any other LVDS encoder.
 
 required:
   - compatible