IVGCVSW-4511 Add BFloat16 to RefLayerSupport and unit tests

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: Ifaae4d5aac468ba927b2c6a4bf31b8c8522aeb2e
diff --git a/src/backends/reference/workloads/RefPermuteWorkload.cpp b/src/backends/reference/workloads/RefPermuteWorkload.cpp
index d0e1431..5751ed8 100644
--- a/src/backends/reference/workloads/RefPermuteWorkload.cpp
+++ b/src/backends/reference/workloads/RefPermuteWorkload.cpp
@@ -28,6 +28,7 @@
                         src->Map(), dst->Map(), sizeof(T));
 }
 
+template class RefPermuteWorkload<DataType::BFloat16>;
 template class RefPermuteWorkload<DataType::Float16>;
 template class RefPermuteWorkload<DataType::Float32>;
 template class RefPermuteWorkload<DataType::QAsymmU8>;