amlv4l2dec: CF1 Correct the calculation of pts [1/1]

PD#SWPL-179159

Problem:
When the frame rate is not present, pts is incorrectly calculated

Solution:
add protection for calculation of pts;

Verify:
ap222

Change-Id: Icac56d13c1d1d8225472745ce31d3019c6fbb551
Signed-off-by: hanghang.luo <hanghang.luo@amlogic.com>
1 file changed