dt-bindings: interrupt-controller: apple,aic2: Add AICv3

AIC version 3 as found on the Apple M3 (t8122) is very similar to AICv2 in
its base functionality. It can use the same device tree bindings as AICv2
so add it to the AICv2 bindings. This interrupt controller is used on all
Apple SoCs starting with M3 up to at least M5.

The only apparent difference is the increased IRQ config offset. Apple's
device tree codes this new offset as property of the "aic" node but the
value stayed constant for all SoCs with "aic,3". Since the SoC specific
compatible "apple,t8122-aic3" will be only used in the driver this offset
can remain a driver implementation detail.

Signed-off-by: Janne Grunau <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

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

···
 $id: http://devicetree.org/schemas/interrupt-controller/apple,aic2.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Apple Interrupt Controller 2
+title: Apple Interrupt Controller 2 and 3
 
 maintainers:
-  - Hector Martin <[e-mail]>
+  - Janne Grunau <[e-mail]>
 
 description: |
   The Apple Interrupt Controller 2 is a simple interrupt controller present on
···
   which do not go through a discrete interrupt controller. It also handles
   FIQ-based Fast IPIs.
 
+  The Apple Interrupt Controller 3 is in its base functionality very similar to
+  the Apple Interrupt Controller 2 and uses the same device tree bindings. It is
+  found on Apple ARM SoCs platforms starting with t8122 (M3).
+
 properties:
   compatible:
-    items:
-      - enum:
-          - apple,t8112-aic
-          - apple,t6000-aic
-          - apple,t6020-aic
-      - const: apple,aic2
+    oneOf:
+      - items:
+          - enum:
+              - apple,t6000-aic
+              - apple,t6020-aic
+              - apple,t8112-aic
+          - const: apple,aic2
+      - items:
+          - enum:
+              - apple,t6030-aic3
+          - const: apple,t8122-aic3
+      - const: apple,t8122-aic3
 
   interrupt-controller: true
 
···
       properties:
         compatible:
           contains:
-            const: apple,t8112-aic
+            enum:
+              - apple,t8112-aic
+              - apple,t8122-aic3
     then:
       properties:
         '#interrupt-cells':