dt-bindings: iommu: renesas,ipmmu-vmsa: R-Car V3U is R-Car Gen4

Despite the name, R-Car V3U is the first member of the R-Car Gen4
family.  Hence move its compatible value to the R-Car Gen4 section.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Joerg Roedel <jroedel@suse.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/c1fb71448a8400986fd30d51a1bb2704376c0306.1666361055.git.geert+renesas@glider.beSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.yaml

@@ -29,6 +29,7 @@ properties:
               - renesas,ipmmu-r8a7793  # R-Car M2-N
               - renesas,ipmmu-r8a7794  # R-Car E2
           - const: renesas,ipmmu-vmsa  # R-Mobile APE6 or R-Car Gen2 or RZ/G1
+
       - items:
           - enum:
               - renesas,ipmmu-r8a774a1 # RZ/G2M
@@ -43,9 +44,10 @@ properties:
               - renesas,ipmmu-r8a77980 # R-Car V3H
               - renesas,ipmmu-r8a77990 # R-Car E3
               - renesas,ipmmu-r8a77995 # R-Car D3
-              - renesas,ipmmu-r8a779a0 # R-Car V3U
+
       - items:
           - enum:
+              - renesas,ipmmu-r8a779a0           # R-Car V3U
               - renesas,ipmmu-r8a779f0           # R-Car S4-8
           - const: renesas,rcar-gen4-ipmmu-vmsa  # R-Car Gen4