Fix member name in PadDescriptor

* Renamed m_padValue to m_PadValue to bring it in line with
  our naming conventions

Signed-off-by: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Change-Id: I071aa42c9be495462c64697e5a923a5ec55de146
diff --git a/src/armnnSerializer/Serializer.cpp b/src/armnnSerializer/Serializer.cpp
index 57d6740..c9719aa 100644
--- a/src/armnnSerializer/Serializer.cpp
+++ b/src/armnnSerializer/Serializer.cpp
@@ -578,7 +578,7 @@
 
     auto flatBufferPadDesc = serializer::CreatePadDescriptor(m_flatBufferBuilder,
                                                              m_flatBufferBuilder.CreateVector(padList),
-                                                             padDescriptor.m_padValue);
+                                                             padDescriptor.m_PadValue);
 
     auto flatBufferPadLayer = serializer::CreatePadLayer(m_flatBufferBuilder,
                                                          flatBufferBaseLayer,