ARM: dts: fp5280g2: Cleanup gpio-keys-polled properties

dtbs_check gave the following warning:

Warning (avoid_unnecessary_addr_size): /gpio-keys-polled: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property

Cc: John Wang <[e-mail]>
Signed-off-by: Andrew Jeffery <[e-mail]>
Reviewed-by: Joel Stanley <[e-mail]>
Reviewed-by: Adriana Kobylak <[e-mail]>
Tested-by: Adriana Kobylak <[e-mail]>
Signed-off-by: Joel Stanley <[e-mail]>

arch/arm/boot/dts/aspeed-bmc-inspur-fp5280g2.dts

···
 
 	gpio-keys-polled {
 		compatible = "gpio-keys-polled";
-		#address-cells = <1>;
-		#size-cells = <0>;
 		poll-interval = <1000>;
 
 		fan0-presence {