fix bridgetower cross-attn mask shape bug (#49447)
* fix bridgetower cross-attn mask shape bug
Signed-off-by: kaixuanliu <kaixuan.liu@intel.com>
* avoid using mask for image stream
Signed-off-by: kaixuanliu <kaixuan.liu@intel.com>
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Signed-off-by: kaixuanliu <kaixuan.liu@intel.com>
