ARM: dts: imx: Add missing chosen/stdout-path

This makes it possible to enable earlycon for debugging by just passing
an empty "earlycon" argument on the kernel command-line.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx7d-sdb.dts

@@ -10,6 +10,10 @@
 	model = "Freescale i.MX7 SabreSD Board";
 	compatible = "fsl,imx7d-sdb", "fsl,imx7d";
 
+	chosen {
+		stdout-path = &uart1;
+	};
+
 	memory@80000000 {
 		reg = <0x80000000 0x80000000>;
 	};