Modify auotcheck point of yaffs file system.

To improve file system mount time.
Signed-off-by: Rashed Abdel-Tawab <rashedabdeltawab@gmail.com>

Change-Id: I9b113cd515219c3b5613a92e7dd195690b2ae1b0
Merge "Modify auotcheck point of yaffs file system." into cm-10.1