IVGCVSW-4516 Add ConvertFp32ToBf16Layer and Ref workload support

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: I9099a4f840fb747336f77d20a0868b64e801a310
diff --git a/src/backends/reference/workloads/CMakeLists.txt b/src/backends/reference/workloads/CMakeLists.txt
index 86764d8..9f3880e 100644
--- a/src/backends/reference/workloads/CMakeLists.txt
+++ b/src/backends/reference/workloads/CMakeLists.txt
@@ -73,6 +73,8 @@
     RefConvertBf16ToFp32Workload.hpp
     RefConvertFp16ToFp32Workload.cpp
     RefConvertFp16ToFp32Workload.hpp
+    RefConvertFp32ToBf16Workload.cpp
+    RefConvertFp32ToBf16Workload.hpp
     RefConvertFp32ToFp16Workload.cpp
     RefConvertFp32ToFp16Workload.hpp
     RefConvolution2dWorkload.cpp