arm: dts: microchip: remove unused #address-cells/#size-cells from sam9x60 udc node

The UDC node does not define any child nodes, so the "#address-cells" and
"#size-cells" properties are unnecessary. Remove these unused properties
to simplify the devicetree node and keep it consistent with DT conventions.

Signed-off-by: Charan Pedumuru <charan.pedumuru@gmail.com>
Link: https://lore.kernel.org/r/20260307-atmel-usb-v3-1-3dc48fe772be@gmail.com
Reviewed-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
[claudiu.beznea: s/at91/microchip in commit title]
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>

Author: Charan-Pedumuru

arch/arm/boot/dts/microchip/sam9x60.dtsi

@@ -75,8 +75,6 @@
 		ranges;
 
 		usb0: gadget@500000 {
-			#address-cells = <1>;
-			#size-cells = <0>;
 			compatible = "microchip,sam9x60-udc";
 			reg = <0x00500000 0x100000
 				0xf803c000 0x400>;