dt-bindings: interrupt-controller: renesas,rzg2l-irqc: Document RZ/G3S

Document the RZ/G3S (R9108G045) interrupt controller. This has few extra
functionalities compared with RZ/G2UL but the already existing driver
can still be used.

Signed-off-by: Claudiu Beznea <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Acked-by: Conor Dooley <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml

···
           - renesas,r9a07g043u-irqc   # RZ/G2UL
           - renesas,r9a07g044-irqc    # RZ/G2{L,LC}
           - renesas,r9a07g054-irqc    # RZ/V2L
+          - renesas,r9a08g045-irqc    # RZ/G3S
       - const: renesas,rzg2l-irqc
 
   '#interrupt-cells':
···
       properties:
         compatible:
           contains:
-            const: renesas,r9a07g043u-irqc
+            enum:
+              - renesas,r9a07g043u-irqc
+              - renesas,r9a08g045-irqc
     then:
       properties:
         interrupts: