decoder: CB1 speed use u64 [1/1]

PD#SWPL-195541

Problem:
u32 overflow when calculate speed

Solution:
calculate speed use u64

Verify:
sc2

Change-Id: I7819321de383c52e8a4e911b4ed35674a35ea562
Signed-off-by: Hao Shi <hao.shi@amlogic.com>
24 files changed