ipq40xx: set #size-cells to 0 to fix warning

qcom-ipq4018-ex6100v2.dtb: Warning (reg_format): "reg" property in
	/led_spi/led_gpio@0 has invalid length (4 bytes)
qcom-ipq4018-ex6100v2.dtb: Warning (avoid_default_addr_size):
	Relying on default #size-cells value for /led_spi/led_gpio@0

Cc: Thomas Hebb <tommyhebb@gmail.com>
Cc: David Bauer <mail@david-bauer.net>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

target/linux/ipq40xx/files-4.14/arch/arm/boot/dts/qcom-ipq4018-ex61x0v2.dtsi

@@ -102,7 +102,7 @@
 	led_spi {
 		compatible = "spi-gpio";
 		#address-cells = <1>;
-		ranges;
+		#size-cells = <0>;
 
 		gpio-sck = <&tlmm 5 GPIO_ACTIVE_HIGH>;
 		gpio-mosi = <&tlmm 4 GPIO_ACTIVE_HIGH>;