Enable quantization for bf16 model

Differential Revision: D82866443

Pull Request resolved: #14558

Author: navsud

backends/qualcomm/quantizer/annotators.py

@@ -68,7 +68,7 @@ def _is_float_tensor(node: Node):
         or not isinstance(node.meta["val"], FakeTensor)
     ):
         return False
-    return node.meta["val"].dtype == torch.float32
+    return node.meta["val"].dtype in (torch.bfloat16, torch.float32)
 
 
 def _mark_nodes_as_annotated(nodes: List[Node]):