vp8: modify for add soft vp8 decoder [2/3]

PD# GH-245

Problem:
vp8 play do not smooth

Solution:
modify for add vendor soft decoder
for vp8 decoder

Test: U212

Bug: 149354182
Signed-off-by: Jian Wang <jian.wang@amlogic.com>
Change-Id: Icda72035180451bfaae45a8316a8964781905db8