ARM: sun5i: dt: Add UART3 CTS and RTS pins

Add a separate pinctrl node for the UART3 CTS and RTS pins shared between
the A10s and A13.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: NHans de Goede <hdegoede@redhat.com>
Reviewed-by: NChen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sun5i.dtsi

@@ -536,6 +536,13 @@
 				allwinner,drive = <SUN4I_PINCTRL_10_MA>;
 				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
 			};
+
+			uart3_pins_cts_rts_a: uart3-cts-rts@0 {
+				allwinner,pins = "PG11", "PG12";
+				allwinner,function = "uart3";
+				allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+			};
 		};
 
 		timer@01c20c00 {