ARM: dts: omap: am335x: Use non-deprecated rts-gpios

The 'rts-gpio' (without trailing 's') is deprecated in favor of
'rts-gpios'.  Kernel supports both variants, so switch the DTS to
preferred one.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250514125158.56285-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

Author: krzk

arch/arm/boot/dts/ti/omap/am335x-nano.dts

@@ -167,7 +167,7 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart1_pins>;
 	status = "okay";
-	rts-gpio = <&gpio0 13 GPIO_ACTIVE_HIGH>;
+	rts-gpios = <&gpio0 13 GPIO_ACTIVE_HIGH>;
 	rs485-rts-active-high;
 	rs485-rx-during-tx;
 	rs485-rts-delay = <1 1>;
@@ -178,7 +178,7 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart2_pins>;
 	status = "okay";
-	rts-gpio = <&gpio2 15 GPIO_ACTIVE_HIGH>;
+	rts-gpios = <&gpio2 15 GPIO_ACTIVE_HIGH>;
 	rs485-rts-active-high;
 	rs485-rts-delay = <1 1>;
 	linux,rs485-enabled-at-boot-time;
@@ -187,7 +187,7 @@
 &uart3 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart3_pins>;
-	rts-gpio = <&gpio2 17 GPIO_ACTIVE_HIGH>;
+	rts-gpios = <&gpio2 17 GPIO_ACTIVE_HIGH>;
 	rs485-rts-active-high;
 	rs485-rx-during-tx;
 	rs485-rts-delay = <1 1>;
@@ -198,7 +198,7 @@
 &uart4 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart4_pins>;
-	rts-gpio = <&gpio0 9 GPIO_ACTIVE_HIGH>;
+	rts-gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
 	rs485-rts-active-high;
 	rs485-rx-during-tx;
 	rs485-rts-delay = <1 1>;

arch/arm/boot/dts/ti/omap/am335x-pdu001.dts

@@ -256,7 +256,7 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins>;
 
-	rts-gpio = <&gpio1 9 GPIO_ACTIVE_HIGH>;
+	rts-gpios = <&gpio1 9 GPIO_ACTIVE_HIGH>;
 	rs485-rts-active-high;
 	rs485-rts-delay = <0 0>;
 	linux,rs485-enabled-at-boot-time;