dt-bindings: serial: sc16is7xx: move 'allOf' block after 'required'

The 'allOf' block should go after the 'required' block according to DT
bindings best practices.
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231013141925.3427158-2-hugo@hugovil.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/serial/nxp,sc16is7xx.yaml

@@ -70,16 +70,16 @@ properties:
       minimum: 0
       maximum: 1
 
-allOf:
-  - $ref: /schemas/spi/spi-peripheral-props.yaml#
-  - $ref: /schemas/serial/serial.yaml#
-  - $ref: /schemas/serial/rs485.yaml#
-
 required:
   - compatible
   - reg
   - interrupts
 
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+  - $ref: /schemas/serial/serial.yaml#
+  - $ref: /schemas/serial/rs485.yaml#
+
 oneOf:
   - required:
       - clocks