dt-bindings: reset: renesas,rst: Document r8a774e1 reset module

Document bindings for the RZ/G2H (R8A774E1) reset module.
Signed-off-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/1594138692-16816-7-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Documentation/devicetree/bindings/reset/renesas,rst.yaml

@@ -31,6 +31,7 @@ properties:
       - renesas,r8a774a1-rst      # RZ/G2M
       - renesas,r8a774b1-rst      # RZ/G2N
       - renesas,r8a774c0-rst      # RZ/G2E
+      - renesas,r8a774e1-rst      # RZ/G2H
       - renesas,r8a7778-reset-wdt # R-Car M1A
       - renesas,r8a7779-reset-wdt # R-Car H1
       - renesas,r8a7790-rst       # R-Car H2