Quantization copy constructor
Quantization copy constructor

* Fix compiler implicit copy deprecation warning.
* Simplify copy operator by removing unnecessary equality comparison.
    Now just does pointer comparison instead.

Change-Id: I9ebe170c637c636919b9d8729a78449148b7f83e
Signed-off-by: Derek Lamberti <13dfee3fe1de0296baa84dd1089b56bb473c6f88@arm.com>

ARM-software/armnn,ARM-software/armnn,ARM-software/armnn