ARM: dts: imx6dl-colibri-eval-v3: Add chosen node

Add Colibri UART_A as default serial console.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts

@@ -68,6 +68,10 @@ aliases {
 		rtc1 = &snvs_rtc;
 	};
 
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
 	clocks {
 		/* Fixed crystal dedicated to mcp251x */
 		clk16m: clk@1 {