radeon/vcn: release si buffer for encoding at the end.
Signed-off-by: Ruijing Dong Ruijing.Dong@amd.com Reviewed-by: Leo Liu leo.liu@amd.com Reviewed-by: Boyuan Zhang Boyuan.Zhang@amd.com
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Signed-off-by: Ruijing Dong Ruijing.Dong@amd.com Reviewed-by: Leo Liu leo.liu@amd.com Reviewed-by: Boyuan Zhang Boyuan.Zhang@amd.com