PD#SWPL-4469
Problem:
dolby files have no sounds after replay
Solution:
in u212, the clk_81 is null when init, it is related
to demux pcr, so add clk_81 to enable demux pcr
Verify:
verify by franklin
Change-Id: Id862e4e8ac49c19bbd52fa6fa4831de20abad6c8
Signed-off-by: Cheng Tong <cheng.tong@amlogic.com>