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 <aladyshev22@gmail.com>
Link: https://lore.kernel.org/r/20230111115227.1357-1-aladyshev22@gmail.com


Signed-off-by: Joel Stanley <joel@jms.id.au>