IVGCVSW-2997 Refactor reference LSTM workload

Signed-off-by: Nattapat Chaimanowong <nattapat.chaimanowong@arm.com>
Change-Id: I6883f878d9f701a55153292769d2fc0530d2529e
diff --git a/src/backends/reference/backend.mk b/src/backends/reference/backend.mk
index 06459ed..5034c0f 100644
--- a/src/backends/reference/backend.mk
+++ b/src/backends/reference/backend.mk
@@ -47,7 +47,7 @@
         workloads/RefFullyConnectedUint8Workload.cpp \
         workloads/RefGatherWorkload.cpp \
         workloads/RefL2NormalizationFloat32Workload.cpp \
-        workloads/RefLstmFloat32Workload.cpp \
+        workloads/RefLstmWorkload.cpp \
         workloads/RefMeanFloat32Workload.cpp \
         workloads/RefMeanUint8Workload.cpp \
         workloads/RefMergerFloat32Workload.cpp \