ath79: drop redundant gpios on i2c

Since "sda-gpios" and "scl-gpios" are only available since kernel 4.19,
a few devices have redundantly defined "gpios" to also support older
kernels. Since we have nothing older than 4.19 now, we can remove
the redundant definitions.

Signed-off-by: Adrian Schmutzler <[email protected]>

target/linux/ath79/dts/ar7161_aruba_ap-105.dts

@@ -85,10 +85,6 @@
 		sda-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
 		scl-gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
 
-		/* can be removed on 4.19 */
-		gpios = <&gpio 5 GPIO_ACTIVE_LOW>,
-			<&gpio 4 GPIO_ACTIVE_LOW>;
-
 		#address-cells = <1>;
 		#size-cells = <0>;
 

target/linux/ath79/dts/ar9344_zbtlink_zbt-wd323.dts

@@ -30,10 +30,6 @@
 		sda-gpios = <&gpio 19 GPIO_ACTIVE_LOW>;
 		scl-gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
 
-		/* can be removed on 4.19 */
-		gpios = <&gpio 19 GPIO_ACTIVE_LOW>,
-			<&gpio 15 GPIO_ACTIVE_LOW>;
-
 		pcf8563: pcf8563@51 {
 			compatible = "nxp,pcf8563";
 			reg = <0x51>;