fix[av1_syntax]: Fix array out-of-bounds issue.

Platform: General
Spec: av1

Reported-by: Herman Chen <herman.chen@rock-chips.com>
Signed-off-by: Hongjin Li <vic.hong@rock-chips.com>
Change-Id: I338545eb1fdb7e726c8c6f81c103061fd0dc9c9d

mpp/common/av1d_syntax.h

@@ -245,7 +245,7 @@ typedef struct _DXVA_PicParams_AV1 {
     UCHAR coded_lossless;
     RK_S32 all_lossless;
     UCHAR interp_filter;
-    UCHAR RefFrameMapTextureIndex[7];
+    UCHAR RefFrameMapTextureIndex[8];
     UINT32 upscaled_width;
     UINT32 frame_to_show_map_idx;
     UINT32 show_existing_frame;