dcu adapter ernie45t (#2756)

Co-authored-by: lifu <lifu@sugon.com>
Co-authored-by: yongqiangma <xing.wo@163.com>

fastdeploy/model_executor/layers/backends/__init__.py

@@ -37,3 +37,9 @@ if current_platform.is_gcu():
     from .gcu import *
     if hasattr(gcu, '__all__'):
         __all__.extend(gcu.__all__)
+
+if current_platform.is_dcu():
+    from .dcu import *
+    from . import dcu
+    if hasattr(dcu, '__all__'):
+        __all__.extend(dcu.__all__)