media: dt-bindings: rcar-csi2: Add R8A774B1 support

Add the compatible string for RZ/G2N (R8A774B1) to the list of supported
SoCs.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

Documentation/devicetree/bindings/media/renesas,csi2.txt

@@ -9,6 +9,7 @@ Mandatory properties
 --------------------
  - compatible: Must be one or more of the following
    - "renesas,r8a774a1-csi2" for the R8A774A1 device.
+   - "renesas,r8a774b1-csi2" for the R8A774B1 device.
    - "renesas,r8a774c0-csi2" for the R8A774C0 device.
    - "renesas,r8a7795-csi2" for the R8A7795 device.
    - "renesas,r8a7796-csi2" for the R8A7796 device.