v4l2dec: fix typo [1/1]

PD#SWPL-154097

Problem:
Set PAR_N in if will make par can not be update

Solution:
Fix the typo

Verify:
AH212

Change-Id: I82620e844f7329cc1ea24af51d26f6138851568b
Signed-off-by: sheng.liu <sheng.liu@amlogic.com>
1 file changed