MLCE-84 Add Neon Pad support and unit tests

Change-Id: I0d949a9f23a61af5013efdd18572b29fae585f2a
diff --git a/src/backends/neon/workloads/CMakeLists.txt b/src/backends/neon/workloads/CMakeLists.txt
index 713418d..1a1ed74 100644
--- a/src/backends/neon/workloads/CMakeLists.txt
+++ b/src/backends/neon/workloads/CMakeLists.txt
@@ -40,6 +40,8 @@
     NeonMultiplicationFloatWorkload.hpp
     NeonNormalizationFloatWorkload.cpp
     NeonNormalizationFloatWorkload.hpp
+    NeonPadWorkload.cpp
+    NeonPadWorkload.hpp
     NeonPermuteWorkload.cpp
     NeonPermuteWorkload.hpp
     NeonPooling2dWorkload.cpp