MLCE-754 'Improve operator support error/warning from Arm NN Delegate'

* Improved error reporting on armnn_delegate

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: I1bd131fb56d64b32b1fafad0465256178720226c
diff --git a/delegate/src/Unpack.hpp b/delegate/src/Unpack.hpp
index 4163163..447a4da 100644
--- a/delegate/src/Unpack.hpp
+++ b/delegate/src/Unpack.hpp
@@ -137,7 +137,7 @@
     {
         // Check if splitter is supported
         bool isSupported = false;
-        FORWARD_LAYER_SUPPORT_FUNC(__func__,
+        FORWARD_LAYER_SUPPORT_FUNC("UNPACK",
                                    tfLiteContext,
                                    IsSplitterSupported,
                                    delegateData.m_Backends,
@@ -156,7 +156,7 @@
     if (!delegateData.m_Network)
     {
         bool isSupported = false;
-        FORWARD_LAYER_SUPPORT_FUNC(__func__,
+        FORWARD_LAYER_SUPPORT_FUNC("RESHAPE",
                                    tfLiteContext,
                                    IsReshapeSupported,
                                    delegateData.m_Backends,