dt-bindings: mailbox: apple,mailbox: Add t8112 compatibles

The mailbox hardware remains unchanged on M2 SoCs so just add its
per-SoC compatible.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Janne Grunau <j@jannau.net>
Signed-off-by: Hector Martin <marcan@marcan.st>

Author: jannau

Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml

@@ -29,6 +29,7 @@ properties:
         items:
           - enum:
               - apple,t8103-asc-mailbox
+              - apple,t8112-asc-mailbox
               - apple,t6000-asc-mailbox
           - const: apple,asc-mailbox-v4
 
@@ -39,6 +40,7 @@ properties:
         items:
           - enum:
               - apple,t8103-m3-mailbox
+              - apple,t8112-m3-mailbox
               - apple,t6000-m3-mailbox
           - const: apple,m3-mailbox-v2