Fixed minor issues for bmm/mm decompositon (pytorch#109836)

Summary:

* Fixed minor issues for bmm/mm decompositon
* enabled addmm for inductor

Test Plan: ci

Reviewed By: mikekgfb

Differential Revision: D49522332

torch/_inductor/decomposition.py

@@ -194,7 +194,7 @@ def all_dim(input, dim, keepdim=False):
 
 @register_decomposition([aten.bmm])
 def bmm(self, batch2):
-    if self.device == "cpu":
+    if self.device.type == "cpu":
         if self.size(1) == 1 and batch2.size(-1) == 1:
             return torch.sum(
                 self.squeeze(1) * batch2.squeeze(-1), dim=1, keepdim=True
@@ -209,7 +209,7 @@ def mm(self, input2):
     if config.coordinate_descent_tuning:
         if self.shape[0] == 1 or input2.shape[1] == 1:
             return (self.unsqueeze(2) * input2.unsqueeze(0)).sum(dim=1)
-    if self.device == "cpu":
+    if self.device.type == "cpu":
         if (
             self.size(-1) == 1
             and input2.size(0) == 1