ODROID-M2: dtb/dtbo: Add uart1 cts rts function.

- Deleted overlay uart0-with-ctsrts.dts cuz hw flow not working.
- add pinctrl-1 uart9
- add overlay for enable uart9 cts rts
- uart9 = uart1(serial1)

Signed-off-by: YoungSoo Shin <shinys000114@gmail.com>
Change-Id: I1117ad7afb592c8cf4d9deb9f491f8007bac4d4f

arch/arm64/boot/dts/rockchip/overlays/odroidm2/Makefile

@@ -20,6 +20,7 @@ dtbo-y += \
 	spi0.dtbo \
 	ttyfiq0_115200.dtbo \
 	uart0.dtbo \
+	uart1-with-ctsrts.dtbo \
 	uart1.dtbo \
 	uart2.dtbo \
 	uart3.dtbo \

arch/arm64/boot/dts/rockchip/overlays/odroidm2/uart1-with-ctsrts.dts

@@ -0,0 +1,13 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+	fragment@0 {
+		target = <&uart9>;
+
+		__overlay__ {
+			status = "okay";
+			pinctrl-names = "not_use_it", "default";
+		};
+	};
+};

arch/arm64/boot/dts/rockchip/rk3588s-odroid-m2.dtsi

@@ -1049,6 +1049,7 @@
 
 &uart9 {
 	pinctrl-0 = <&uart9m2_xfer>;
+	pinctrl-1 = <&uart9m2_xfer &uart9m2_ctsn &uart9m2_rtsn>;
 	dma-names = "tx", "rx";
 	status = "disabled";
 };