ARM: dts: aspeed: ethanolx: Enable CTS/RTS pins on UART1

BMC UART1 is connected to the P0 CPU UART1. As the connection has
CTS and RTS signals, enable these functions on the BMC side.

Signed-off-by: Konstantin Aladyshev <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Joel Stanley <[e-mail]>

arch/arm/boot/dts/aspeed-bmc-amd-ethanolx.dts

···
 	status = "okay";
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_txd1_default
-		     &pinctrl_rxd1_default>;
+		     &pinctrl_rxd1_default
+		     &pinctrl_nrts1_default
+		     &pinctrl_ncts1_default>;
 };
 
 &uart5 {