Rename quantized data types to remove ambiguity for signed/unsigned payloads

!android-nn-driver:2572

Change-Id: I8fe52ceb09987b3d05c539409510f535165455cc
Signed-off-by: Derek Lamberti <derek.lamberti@arm.com>
diff --git a/src/backends/reference/workloads/RefPadWorkload.cpp b/src/backends/reference/workloads/RefPadWorkload.cpp
index c4b9dae..356f6b1 100644
--- a/src/backends/reference/workloads/RefPadWorkload.cpp
+++ b/src/backends/reference/workloads/RefPadWorkload.cpp
@@ -35,7 +35,7 @@
 
 template class RefPadWorkload<DataType::Float32>;
 template class RefPadWorkload<DataType::Float16>;
-template class RefPadWorkload<DataType::QuantisedAsymm8>;
-template class RefPadWorkload<DataType::QuantisedSymm16>;
+template class RefPadWorkload<DataType::QAsymmU8>;
+template class RefPadWorkload<DataType::QSymmS16>;
 
 } //namespace armnn
\ No newline at end of file