dt-bindings: mfd: cirrus,madera: Fix 'interrupts' in example

The 'interrupts' properties takes an irq number, not a phandle, and
'interrupt-parent' isn't needed in examples.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220119015611.2442819-1-robh@kernel.org

Documentation/devicetree/bindings/mfd/cirrus,madera.yaml

@@ -245,8 +245,7 @@ examples:
 
             interrupt-controller;
             #interrupt-cells = <2>;
-            interrupts = <&host_irq1>;
-            interrupt-parent = <&gic>;
+            interrupts = <4 1 0>;
 
             gpio-controller;
             #gpio-cells = <2>;