ath79: drop cs-gpios property

The spi-ath79 driver performs the chipselect by writing to dedicated
register in the SPI register block. So the GPIO numbers were not used.

Tested-on: Enterasys WS-AP3705i

Signed-off-by: David Bauer <[email protected]>

target/linux/ath79/dts/ar7161_buffalo_wzr-hp-ag300h.dtsi

@@ -219,7 +219,6 @@
 &spi {
 	status = "okay";
 
-	cs-gpios = <0>, <0>;
 
 	flash0: flash@0 {
 		compatible = "jedec,spi-nor";

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

@@ -107,8 +107,6 @@
 &spi {
 	status = "okay";
 
-	cs-gpios = <0>, <0>;
-
 	flash0: flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;

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

@@ -163,8 +163,6 @@
 &spi {
 	status = "okay";
 
-	cs-gpios = <0>, <0>;
-
 	flash0: flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;

target/linux/ath79/dts/ar9344_enterasys_ws-ap3705i.dts

@@ -114,8 +114,6 @@
 &spi {
 	status = "okay";
 
-	cs-gpios = <0>, <0>;
-
 	flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;