dt-bindings: interrupt-controller: renesas,rzv2h-icu: Document RZ/G3E SoC

Document RZ/G3E (R9A09G047) ICU bindings. The ICU block on the RZ/G3E
SoC is almost identical to the one found on the RZ/V2H SoC, with the
following differences:
 - The TINT register base offset is 0x800 instead of zero.
 - The number of supported GPIO interrupts for TINT selection is 141
   instead of 86.
 - The pin index and TINT selection index are not in the 1:1 map
 - The number of TSSR registers is 16 instead of 8
 - Each TSSR register can program 2 TINTs instead of 4 TINTs

Hence add the new compatible string "renesas,r9a09g047-icu" for RZ/G3E SoC.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/all/20250224131253.134199-2-biju.das.jz@bp.renesas.com

Documentation/devicetree/bindings/interrupt-controller/renesas,rzv2h-icu.yaml

@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/interrupt-controller/renesas,rzv2h-icu.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Renesas RZ/V2H(P) Interrupt Control Unit
+title: Renesas RZ/{G3E,V2H(P)} Interrupt Control Unit
 
 maintainers:
   - Fabrizio Castro <fabrizio.castro.jz@renesas.com>
@@ -20,7 +20,9 @@ description:
 
 properties:
   compatible:
-    const: renesas,r9a09g057-icu # RZ/V2H(P)
+    enum:
+      - renesas,r9a09g047-icu # RZ/G3E
+      - renesas,r9a09g057-icu # RZ/V2H(P)
 
   '#interrupt-cells':
     description: The first cell is the SPI number of the NMI or the