IVGCVSW-7172 Add ElementwiseBinary (Subtraction & Multiplication) support to TOSA Reference Backend

 * Removed AdditionOperator and moved to new ElementwiseBinaryOperator.

Signed-off-by: Nikhil Raj <nikhil.raj@arm.com>
Signed-off-by: Matthew Sloyan <matthew.sloyan@arm.com>
Change-Id: I8ce20f7575d68334aadcd176827bca3db53d0052
diff --git a/src/backends/tosaCommon/TosaMappings.cpp b/src/backends/tosaCommon/TosaMappings.cpp
index 1452e4a..b0f8fd9 100644
--- a/src/backends/tosaCommon/TosaMappings.cpp
+++ b/src/backends/tosaCommon/TosaMappings.cpp
@@ -24,8 +24,10 @@
     switch (type)
     {
         case LayerType::Addition:
+        case LayerType::Multiplication:
+        case LayerType::Subtraction:
         {
-            return ConvertAdditionToTosaOperator(layer, inputs, outputs);
+            return ConvertElementwiseBinaryToTosaOperator(layer, type, inputs, outputs);
         }
         case LayerType::Concat:
         {