dt-bindings: serial: renesas,scif: Document RZ/G3L SoC

Add SCIF binding documentation for Renesas RZ/G3L SoC. SCIF block on the
RZ/G3L is identical to one found on the RZ/G3S SoC.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Link: https://patch.msgid.link/20260120125232.349708-2-biju.das.jz@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: bijudas

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

@@ -82,6 +82,7 @@ properties:
               - renesas,scif-r9a07g043      # RZ/G2UL and RZ/Five
               - renesas,scif-r9a07g054      # RZ/V2L
               - renesas,scif-r9a08g045      # RZ/G3S
+              - renesas,scif-r9a08g046      # RZ/G3L
           - const: renesas,scif-r9a07g044   # RZ/G2{L,LC} fallback
 
       - items: