IVGCVSW-4211 Add Signed 8 bit Quantisation support into the Reference backend

!android-nn-driver:2435

Signed-off-by: Finn Williams <Finn.Williams@arm.com>
Change-Id: I10ecd4a8937725953396805f33a3562a5384c4d4
diff --git a/src/backends/aclCommon/ArmComputeTensorUtils.cpp b/src/backends/aclCommon/ArmComputeTensorUtils.cpp
index 328a083..9250b61 100644
--- a/src/backends/aclCommon/ArmComputeTensorUtils.cpp
+++ b/src/backends/aclCommon/ArmComputeTensorUtils.cpp
@@ -27,7 +27,7 @@
             return arm_compute::DataType::QASYMM8;
         case armnn::DataType::QuantisedSymm16:
             return arm_compute::DataType::QSYMM16;
-        case armnn::DataType::QuantisedSymm8:
+        case armnn::DataType::QSymmS8:
             return arm_compute::DataType::QSYMM8;
         case armnn::DataType::QuantizedSymm8PerAxis:
             return arm_compute::DataType::QSYMM8_PER_CHANNEL;