dt-bindings: clock: renesas,cpg-mssr: Document r8a779g0

Add binding documentation for the R-Car V4H (R8A779G0) Clock Pulse
Generator.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220420084255.375700-7-yoshihiro.shimoda.uh@renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Documentation/devicetree/bindings/clock/renesas,cpg-mssr.yaml

@@ -49,6 +49,7 @@ properties:
       - renesas,r8a77995-cpg-mssr # R-Car D3
       - renesas,r8a779a0-cpg-mssr # R-Car V3U
       - renesas,r8a779f0-cpg-mssr # R-Car S4-8
+      - renesas,r8a779g0-cpg-mssr # R-Car V4H
 
   reg:
     maxItems: 1