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/backendsCommon/test/IsLayerSupportedTestImpl.hpp b/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp
index a070ac0..d646847 100644
--- a/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp
+++ b/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp
@@ -447,6 +447,8 @@
 
 DECLARE_LAYER_POLICY_1_PARAM(ConvertFp16ToFp32)
 
+DECLARE_LAYER_POLICY_1_PARAM(ConvertFp32ToBf16)
+
 DECLARE_LAYER_POLICY_1_PARAM(ConvertFp32ToFp16)
 
 DECLARE_LAYER_POLICY_2_PARAM(Convolution2d)