dt-bindings: PCI: rcar-pci-host: Document r8a774e1 bindings

Document the RZ/G2H (a.k.a. R8A774E1) SoC in the R-Car PCIe bingings.

[shimoda: minor change the subject and description]

Link: https://lore.kernel.org/r/1604455096-13923-4-git-send-email-yoshihiro.shimoda.uh@renesas.comSigned-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/pci/rcar-pci-host.yaml

@@ -31,6 +31,7 @@ properties:
               - renesas,pcie-r8a774a1     # RZ/G2M
               - renesas,pcie-r8a774b1     # RZ/G2N
               - renesas,pcie-r8a774c0     # RZ/G2E
+              - renesas,pcie-r8a774e1     # RZ/G2H
               - renesas,pcie-r8a7795      # R-Car H3
               - renesas,pcie-r8a7796      # R-Car M3-W
               - renesas,pcie-r8a77961     # R-Car M3-W+