colibri_vf: enable user debug by default

Let the kernel print some debug messages when a user program
crashes due to an exception.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
diff --git a/include/configs/colibri_vf.h b/include/configs/colibri_vf.h
index 0bbeeb9..030281b 100644
--- a/include/configs/colibri_vf.h
+++ b/include/configs/colibri_vf.h
@@ -106,7 +106,7 @@
 	SD_BOOTCMD \
 	UBI_BOOTCMD \
 	"console=ttyLP0\0" \
-	"defargs=\0" \
+	"defargs=user_debug=31\0" \
 	"dfu_alt_info=" DFU_ALT_NAND_INFO "\0" \
 	"fdt_board=eval-v3\0" \
 	"fdt_fixup=;\0" \