dt-bindings: pinctrl: apple,pinctrl: Add apple,t6000-pinctrl compatible

This new SoC uses the same pinctrl hardware, so just add a new per-SoC
compatible.

Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>

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

@@ -17,7 +17,9 @@ description: |
 properties:
   compatible:
     items:
-      - const: apple,t8103-pinctrl
+      - enum:
+          - apple,t8103-pinctrl
+          - apple,t6000-pinctrl
       - const: apple,pinctrl
 
   reg: