ARM: dts: sun8i: h3: Adding UART3 RTS and CTS Pins

This node adds the definition for the UART3 RTS and CTS Pins

That makes it able to use UART3 with RTS and CTS.

Signed-off-by: Philipp Rossak <embed3d@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>