PD#SWPL-8069
Problem:
1.about 2ms latency due to sleep
2.crash while poll ionvideo
Solution:
1.use semaphore instead of sleep
2.fix poll function
3.add trace info for ionvideo
Verify:
U212
Change-Id: Idde64151541d826ba6a6cd1abcc901e80f0e4b45
Signed-off-by: jintao xu <jintao.xu@amlogic.com>