vav1: CB1 fix no memory alloc failed check. [1/1]

PD#OTT-69997
PD#SWPL-194572

Problem:
vav1 not return failed when alloc important buf failed.

Solution:
return invalid when alloc loopbuf failed.

Verify:
S928X

Change-Id: I237b6cafda8f935f94f47df7a7fb66681e1e4e96
Signed-off-by: shihong.zheng <shihong.zheng@amlogic.com>
4 files changed