dt-bindings: mfd: dlg,da9063: Make #interrupt-cells required

'#interrupt-cells' is a required provided for interrupt providers,
hence make it required.

While at it, move '#interrupt-cells' in the example to match common sort
order.

Fixes: 361104b0 ("dt-bindings: mfd: Convert da9063 to yaml")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/f512045738d2102c771a171a514ed7cf612c6d6f.1708944455.git.geert+renesas@glider.beSigned-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/mfd/dlg,da9063.yaml

@@ -112,6 +112,7 @@ allOf:
       required:
         - interrupts
         - interrupt-controller
+        - '#interrupt-cells'
 
   - if:
       properties:
@@ -162,10 +163,10 @@ examples:
       pmic@58 {
         compatible = "dlg,da9063";
         reg = <0x58>;
-        #interrupt-cells = <2>;
         interrupt-parent = <&gpio6>;
         interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
         interrupt-controller;
+        #interrupt-cells = <2>;
 
         rtc {
           compatible = "dlg,da9063-rtc";