initramfs-live-boot: Fix script when multiple mounts are present and the last one isn't the correct one

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/packages/initrdscripts/files/init-live.sh

@@ -58,6 +58,7 @@ do
   for i in `ls /media 2>/dev/null`; do
       if [ -f /media/$i/$ROOT_IMAGE ] ; then
 	  found="yes"
+	  break
       fi
   done
   if [ "$found" = "yes" ]; then