IVGCVSW-2709 Serialize / de-serialize the Splitter layer

* fixed typo in Ref Merger Workload comment
* fixed typo in ViewsDescriptor comment
* made the origins descriptor accessable in the ViewsDescriptor
  (needed for serialization)
* based the unit test on the use of the splitter in the CaffeParser

Change-Id: I3e716839adb4eee5a695633377b49e7e18ec2aa9
Signed-off-by: Ferran Balaguer <ferran.balaguer@arm.com>
Signed-off-by: Francis Murtagh <francis.murtagh@arm.com>
Signed-off-by: Jim Flynn <jim.flynn@arm.com>
diff --git a/src/backends/reference/workloads/Merger.cpp b/src/backends/reference/workloads/Merger.cpp
index 10cc249..8877ee2 100644
--- a/src/backends/reference/workloads/Merger.cpp
+++ b/src/backends/reference/workloads/Merger.cpp
@@ -21,7 +21,7 @@
     if (sourceInfo.GetQuantizationScale() != destInfo.GetQuantizationScale() ||
         sourceInfo.GetQuantizationOffset() != destInfo.GetQuantizationOffset())
     {
-        // Dequantize value acording to sourceInfo params
+        // Dequantize value according to sourceInfo params
         float dequantizedValue = armnn::Dequantize<uint8_t>(source,
                                                             sourceInfo.GetQuantizationScale(),
                                                             sourceInfo.GetQuantizationOffset());