audio: VAD use HIFI PLL [1/1]

audio: VAD use HIFI PLL [1/1]

PD#SWPL-12746

Problem:
VAD does not use HIFI PLL, it will effect vad wakup

Solution:
VAD use HIFI PLL

Verify:
T962X2_X301

Change-Id: Iad13661c4ec3495130f485447f3c8b034bee9ce2
Signed-off-by: jian.zhou <jian.zhou@amlogic.com>