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/RefQuantizeWorkload.cpp b/src/backends/reference/workloads/RefQuantizeWorkload.cpp
index a78804b..31534ab 100644
--- a/src/backends/reference/workloads/RefQuantizeWorkload.cpp
+++ b/src/backends/reference/workloads/RefQuantizeWorkload.cpp
@@ -43,7 +43,7 @@
 
     switch(m_TargetType)
     {
-        case DataType::QuantisedAsymm8:
+        case DataType::QAsymmU8:
         {
             QuantizeImpl<uint8_t>(input, output, m_NumElements, m_Scale, m_Offset);
             break;
@@ -53,7 +53,7 @@
             QuantizeImpl<int8_t>(input, output, m_NumElements, m_Scale, m_Offset);
             break;
         }
-        case DataType::QuantisedSymm16:
+        case DataType::QSymmS16:
         {
             QuantizeImpl<int16_t>(input, output, m_NumElements, m_Scale, 0);
             break;