dt-bindings: pinctrl: sh-pfc: Document r8a774e1 PFC support

Document PFC support for the RZ/G2H (R8A774E1) SoC.
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/1594138692-16816-12-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt

@@ -21,6 +21,7 @@ Required Properties:
     - "renesas,pfc-r8a774a1": for R8A774A1 (RZ/G2M) compatible pin-controller.
     - "renesas,pfc-r8a774b1": for R8A774B1 (RZ/G2N) compatible pin-controller.
     - "renesas,pfc-r8a774c0": for R8A774C0 (RZ/G2E) compatible pin-controller.
+    - "renesas,pfc-r8a774e1": for R8A774E1 (RZ/G2H) compatible pin-controller.
     - "renesas,pfc-r8a7778": for R8A7778 (R-Car M1) compatible pin-controller.
     - "renesas,pfc-r8a7779": for R8A7779 (R-Car H1) compatible pin-controller.
     - "renesas,pfc-r8a7790": for R8A7790 (R-Car H2) compatible pin-controller.