imx53loco: fix dangling create-boot-sd.sh symlink

Signed-off-by: Benoît Thébaudeau <benoit@wsystem.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

board/freescale/imx53loco/create-boot-sd.sh

@@ -1 +1 @@
-../imx6sabre/create-boot-sd.sh
+../create-boot-sd.sh