Needs support for the data types : QUI8, QI8, TFL_Quint8, QI16 in  ELU's definition at tfl_ops.td 
Thank You @mihaimaruseac .  Updated header.  Hi @mihaimaruseac Can you please review this PR ? Thank you! I might be mistaken here but, I think the function might also need the "QuantizableResult" trait. [Check my comment in the original issue](https://github.com/tensorflow/tensorflow/issues/63065#issuecomment-1976815555). The TF build I've used had it and the full int8 model I compiled works correctly so far with it. Since this is MLIR, I'm not the right reviewer here
The ELU's definition in tfl_ops.td ,  needs support for the following data types: QUI8, QI8, TFL_Quint8, QI16.

Reference: https://github.com/tensorflow/tensorflow/issues/63065