IVGCVSW-2792 Update Neon Mul/Sub workload for latest CL master

* Update Neon Subtraction/Multiplication to use BaseWorkload
* Add Uint8 tests for Subtraction/Multiplication

Change-Id: Ied2aa048924817a4db0025b9bd9e54151667bd74
Signed-off-by: Conor Kennedy <conor.kennedy@arm.com>
diff --git a/src/backends/neon/backend.mk b/src/backends/neon/backend.mk
index d9f2ad2..c06d05f 100644
--- a/src/backends/neon/backend.mk
+++ b/src/backends/neon/backend.mk
@@ -36,7 +36,7 @@
         workloads/NeonMeanWorkload.cpp \
         workloads/NeonMergerWorkload.cpp \
         workloads/NeonMinimumWorkload.cpp \
-        workloads/NeonMultiplicationFloatWorkload.cpp \
+        workloads/NeonMultiplicationWorkload.cpp \
         workloads/NeonNormalizationFloatWorkload.cpp \
         workloads/NeonPadWorkload.cpp \
         workloads/NeonPermuteWorkload.cpp \
@@ -46,7 +46,7 @@
         workloads/NeonSoftmaxBaseWorkload.cpp \
         workloads/NeonSoftmaxFloatWorkload.cpp \
         workloads/NeonSoftmaxUint8Workload.cpp \
-        workloads/NeonSubtractionFloatWorkload.cpp
+        workloads/NeonSubtractionWorkload.cpp
 
 else