dt-bindings: serial: renesas,scif: Make resets as a required property

Make "resets" as required property for RZ/G2L. On RZ/G2L the devices
should be explicitly pulled out of reset for this reason make "resets"
as required property.

Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211110232920.19198-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/serial/renesas,scif.yaml

@@ -153,6 +153,7 @@ if:
         enum:
           - renesas,rcar-gen2-scif
           - renesas,rcar-gen3-scif
+          - renesas,scif-r9a07g044
 then:
   required:
     - resets