dt-bindings: interrupt-controller: apple,aic2: Add apple,t8112-aic compatible

The Apple M2 SoC uses AICv2 and is compatible with the existing driver.
Add its per-SoC compatible.
Since multi-die versions of the M2 are not expected decrease
'#interrupt-cells' to 3 for apple,t8112-aic. This is seamlessly handled
inside the driver.

Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>

Documentation/devicetree/bindings/interrupt-controller/apple,aic2.yaml

@@ -31,19 +31,22 @@ description: |
 properties:
   compatible:
     items:
-      - const: apple,t6000-aic
+      - enum:
+          - apple,t8112-aic
+          - apple,t6000-aic
       - const: apple,aic2
 
   interrupt-controller: true
 
   '#interrupt-cells':
-    const: 4
+    minimum: 3
+    maximum: 4
     description: |
       The 1st cell contains the interrupt type:
         - 0: Hardware IRQ
         - 1: FIQ
 
-      The 2nd cell contains the die ID.
+      The 2nd cell contains the die ID (only present on apple,t6000-aic).
 
       The next cell contains the interrupt number.
         - HW IRQs: interrupt number
@@ -109,6 +112,19 @@ additionalProperties: false
 
 allOf:
   - $ref: /schemas/interrupt-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: apple,t8112-aic
+    then:
+      properties:
+        '#interrupt-cells':
+          const: 3
+    else:
+      properties:
+        '#interrupt-cells':
+          const: 4
 
 examples:
   - |