vp8: modify for add soft vp8 decoder [1/3]

PD# GH-245

Problem:
vp8 play do not smooth

Solution:
modify for add vendor soft decoder
for vp8 decoder

Bug: 149354182
Test: U212

Change-Id: I91c6ba90f7d3edc28d6164ec8cd2a57195d0a7a7
Signed-off-by: Jian Wang <jian.wang@amlogic.com>