FIxes enable_xformers_memory_efficient_attention()

Author: SahilCarterr

src/diffusers/models/attention.py

@@ -241,7 +241,10 @@ def set_use_memory_efficient_attention_xformers(
                             op_fw, op_bw = attention_op
                             dtype, *_ = op_fw.SUPPORTED_DTYPES
                         q = torch.randn((1, 2, 40), device="cuda", dtype=dtype)
-                        _ = xops.memory_efficient_attention(q, q, q)
+                        try:
+                            _ = xops.memory_efficient_attention(q, q, q)
+                        except:
+                            _ = xops.ops.memory_efficient_attention(q, q, q)
                 except Exception as e:
                     raise e