m53menlo: fix splashfile location

After merging the boot partition into the root partition, the splashfile
resides in the /boot subdirectory: update the default environment to
reflect that.

Signed-off-by: Olaf Mandel <o.mandel@menlosystems.com>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/include/configs/m53menlo.h b/include/configs/m53menlo.h
index 0e03bb3..257a4cb 100644
--- a/include/configs/m53menlo.h
+++ b/include/configs/m53menlo.h
@@ -205,7 +205,7 @@
 	"mtdparts=" CONFIG_MTDPARTS_DEFAULT "\0"			\
 	"netdev=eth0\0"							\
 	"splashsource=mmc_fs\0"						\
-	"splashfile=usplash.bmp.gz\0"					\
+	"splashfile=boot/usplash.bmp.gz\0"				\
 	"splashimage=0x88000000\0"					\
 	"splashpos=m,m\0"						\
 	"addcons="							\