IVGCVSW-3119 Rename MergerLayer to ConcatLayer

!android-nn-driver:1210

Change-Id: I940b3b9e421c92bfd55ae996f7bc54ac077f2604
Signed-off-by: Jim Flynn <jim.flynn@arm.com>
diff --git a/src/backends/reference/RefWorkloadFactory.cpp b/src/backends/reference/RefWorkloadFactory.cpp
index 1243328..a21becd 100644
--- a/src/backends/reference/RefWorkloadFactory.cpp
+++ b/src/backends/reference/RefWorkloadFactory.cpp
@@ -245,7 +245,7 @@
     return MakeWorkload<RefL2NormalizationFloat32Workload, NullWorkload>(descriptor, info);
 }
 
-std::unique_ptr<armnn::IWorkload> RefWorkloadFactory::CreateConcat(const MergerQueueDescriptor& descriptor,
+std::unique_ptr<armnn::IWorkload> RefWorkloadFactory::CreateConcat(const ConcatQueueDescriptor& descriptor,
                                                                    const WorkloadInfo&          info) const
 {
     if (IsFloat16(info))