arm/fsl-ls: Add CONFIG_OF_STDOUT_VIA_ALIAS

This will allow OF-based earlycon to be used once the appropriate
aliases are added to the device tree and kernel support is fixed.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/include/configs/ls2085a_common.h b/include/configs/ls2085a_common.h
index 9c8a864..a918b18 100644
--- a/include/configs/ls2085a_common.h
+++ b/include/configs/ls2085a_common.h
@@ -46,6 +46,7 @@
 /* Flat Device Tree Definitions */
 #define CONFIG_OF_LIBFDT
 #define CONFIG_OF_BOARD_SETUP
+#define CONFIG_OF_STDOUT_VIA_ALIAS
 
 /* new uImage format support */
 #define CONFIG_FIT