[PATCH] dt-bindings: dma: apple,admac: Fix example interrupt parsing

[Rob Herring <robh@xxxxxxxxxx>]

Commit 873971f8fb08 ("dt-bindings: dma: Add Apple ADMAC") has a warning
in its example:

Documentation/devicetree/bindings/dma/apple,admac.example.dtb: dma-controller@238200000: interrupts-extended: [[0], [4294967295, 0, 626, 4, 0, 0]] is too short
	From schema: /builds/robherring/linux-dt/Documentation/devicetree/bindings/dma/apple,admac.yaml

The problem is the number of interrupt cells can't be guessed when
there are empty '0' entries. So the example must have a valid interrupt
controller defining the number of interrupt cells.

Fixes: 873971f8fb08 ("dt-bindings: dma: Add Apple ADMAC")
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/dma/apple,admac.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/apple,admac.yaml b/Documentation/devicetree/bindings/dma/apple,admac.yaml
index ab8a4ec7779f..bdc8c129c4f5 100644
--- a/Documentation/devicetree/bindings/dma/apple,admac.yaml
+++ b/Documentation/devicetree/bindings/dma/apple,admac.yaml
@@ -63,6 +63,11 @@ examples:
     #include <dt-bindings/interrupt-controller/apple-aic.h>
     #include <dt-bindings/interrupt-controller/irq.h>
 
+    aic: interrupt-controller {
+      interrupt-controller;
+      #interrupt-cells = <3>;
+    };
+
     admac: dma-controller@238200000 {
       compatible = "apple,t8103-admac", "apple,admac";
       reg = <0x38200000 0x34000>;
-- 
2.34.1