arm64: dts: imx8m{m,n}-venice-*: add missing uart-has-rtscts property to UARTs

Add the missing 'uart-has-rtscts' property to UART's that have hardware
flow control capability.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx.dtsi

@@ -221,6 +221,7 @@ &uart3 {
 	pinctrl-0 = <&pinctrl_uart3>, <&pinctrl_bten>;
 	cts-gpios = <&gpio5 8 GPIO_ACTIVE_LOW>;
 	rts-gpios = <&gpio5 9 GPIO_ACTIVE_LOW>;
+	uart-has-rtscts;
 	status = "okay";
 
 	bluetooth {

arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts

@@ -716,6 +716,7 @@ &uart1 {
 	dtr-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>;
 	dsr-gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
 	dcd-gpios = <&gpio1 11 GPIO_ACTIVE_LOW>;
+	uart-has-rtscts;
 	status = "okay";
 };
 
@@ -731,6 +732,7 @@ &uart3 {
 	pinctrl-0 = <&pinctrl_uart3>, <&pinctrl_uart3_gpio>;
 	cts-gpios = <&gpio4 10 GPIO_ACTIVE_LOW>;
 	rts-gpios = <&gpio4 9 GPIO_ACTIVE_LOW>;
+	uart-has-rtscts;
 	status = "okay";
 };
 
@@ -739,6 +741,7 @@ &uart4 {
 	pinctrl-0 = <&pinctrl_uart4>, <&pinctrl_uart4_gpio>;
 	cts-gpios = <&gpio5 11 GPIO_ACTIVE_LOW>;
 	rts-gpios = <&gpio5 12 GPIO_ACTIVE_LOW>;
+	uart-has-rtscts;
 	status = "okay";
 };
 

arch/arm64/boot/dts/freescale/imx8mm-venice-gw7902.dts

@@ -644,6 +644,7 @@ &uart1 {
 	pinctrl-0 = <&pinctrl_uart1>, <&pinctrl_uart1_gpio>;
 	rts-gpios = <&gpio4 10 GPIO_ACTIVE_LOW>;
 	cts-gpios = <&gpio4 11 GPIO_ACTIVE_LOW>;
+	uart-has-rtscts;
 	status = "okay";
 };
 
@@ -660,6 +661,7 @@ &uart3 {
 	pinctrl-0 = <&pinctrl_uart3>, <&pinctrl_uart3_gpio>;
 	rts-gpios = <&gpio2 1 GPIO_ACTIVE_LOW>;
 	cts-gpios = <&gpio2 0 GPIO_ACTIVE_LOW>;
+	uart-has-rtscts;
 	status = "okay";
 
 	bluetooth {
@@ -677,6 +679,7 @@ &uart4 {
 	dtr-gpios = <&gpio4 3 GPIO_ACTIVE_LOW>;
 	dsr-gpios = <&gpio4 4 GPIO_ACTIVE_LOW>;
 	dcd-gpios = <&gpio4 6 GPIO_ACTIVE_LOW>;
+	uart-has-rtscts;
 	status = "okay";
 };
 

arch/arm64/boot/dts/freescale/imx8mn-venice-gw7902.dts

@@ -625,6 +625,7 @@ &uart3 {
 	pinctrl-0 = <&pinctrl_uart3>, <&pinctrl_uart3_gpio>;
 	rts-gpios = <&gpio2 1 GPIO_ACTIVE_LOW>;
 	cts-gpios = <&gpio2 0 GPIO_ACTIVE_LOW>;
+	uart-has-rtscts;
 	status = "okay";
 
 	bluetooth {