property: change property write mode to sync [1/1]

PD#SWPL-183446

Problem:
After setting a property, restart the system and the
property value may be lost

Solution:
change property write mode to sync

Verify:
Local verified on t5w

Signed-off-by: jiahao.liu <jiahao.liu@amlogic.com>
Change-Id: I44682a13222aa1f01fb741847fa0b10bb035c415
1 file changed