dt-bindings: pci: rcar-pci-ep: Document r8a774e1

Document the support for R-Car PCIe EP on R8A774E1 SoC device.

Link: https://lore.kernel.org/r/20200904103851.3946-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

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

@@ -18,6 +18,7 @@ properties:
           - renesas,r8a774a1-pcie-ep     # RZ/G2M
           - renesas,r8a774b1-pcie-ep     # RZ/G2N
           - renesas,r8a774c0-pcie-ep     # RZ/G2E
+          - renesas,r8a774e1-pcie-ep     # RZ/G2H
       - const: renesas,rcar-gen3-pcie-ep # R-Car Gen3 and RZ/G2
 
   reg: