treewide: dts: trim "#size-cells" from "gpio-export" node

The "gpio-export" driver doesn't require a "reg" property in the
device tree, hence we don't need to use the "#size-cells" property
to describe the size of "reg".

Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Link: openwrt#18290
Signed-off-by: Robert Marko <robimarko@gmail.com>

Author: DragonBluep

target/linux/ath79/dts/ar7241_tplink_tl-mr3x20.dtsi

@@ -5,7 +5,6 @@
 / {
 	gpio-export {
 		compatible = "gpio-export";
-		#size-cells = <0>;
 
 		gpio_usb_power {
 			gpio-export,name = "tp-link:power:usb";

target/linux/ath79/dts/ar7242_buffalo_wzr-bhr.dtsi

@@ -50,7 +50,6 @@
 
 	gpio-export {
 		compatible = "gpio-export";
-		#size-cells = <0>;
 
 		gpio_usb_power {
 			gpio-export,name = "buffalo:usb-power";

target/linux/ath79/dts/ar7242_buffalo_wzr-hp-g302h-a1a0.dts

@@ -106,7 +106,6 @@
 
 	gpio-export {
 		compatible = "gpio-export";
-		#size-cells = <0>;
 
 		gpio_usb_power {
 			gpio-export,name = "buffalo:usb-power";

target/linux/ath79/dts/ar9331_hak5_wifi-pineapple-nano.dts

@@ -18,7 +18,6 @@
 
 	gpio-export {
 		compatible = "gpio-export";
-		#size-cells = <0>;
 
 		microsd-detect {
 			gpio-export,name = "microsd-detect";

target/linux/ath79/dts/ar9344_alfa-network_n5q.dts

@@ -19,7 +19,6 @@
 
 	gpio-export {
 		compatible = "gpio-export";
-		#size-cells = <0>;
 
 		watchdog-enable {
 			gpio-export,name = "watchdog-enable";

target/linux/ath79/dts/ar9344_netgear_r6100.dts

@@ -20,7 +20,6 @@
 
 	gpio-export {
 		compatible = "gpio-export";
-		#size-cells = <0>;
 
 		usb-power {
 			gpio-export,name = "usb-power";

target/linux/ath79/dts/qca9531_alfa-network_n2q.dts

@@ -16,7 +16,6 @@
 
 	gpio-export-pcf8574 {
 		compatible = "gpio-export";
-		#size-cells = <0>;
 
 		poe-passthrough {
 			gpio-export,name = "poe-passthrough";

target/linux/ath79/dts/qca9531_alfa-network_r36a.dtsi

@@ -12,7 +12,6 @@
 
 	gpio_export: gpio-export {
 		compatible = "gpio-export";
-		#size-cells = <0>;
 
 		watchdog-enable {
 			gpio-export,name = "watchdog-enable";

target/linux/ath79/dts/qca9558_belkin_f9x-v2.dtsi

@@ -52,7 +52,6 @@
 
 	gpio-export {
 		compatible = "gpio-export";
-		#size-cells = <0>;
 
 		usb2_power {
 			gpio-export,name = "usb2:power";

target/linux/ath79/dts/qca9558_openmesh_om5p-ac-v2.dts

@@ -87,7 +87,6 @@
 
 	gpio-export {
 		compatible = "gpio-export";
-		#size-cells = <0>;
 
 		gpio_pa_dcdc {
 			gpio-export,name = "om5pac:pa_dcdc";