IVGCVSW-6847 replace armnn:Optional with arm::pipe::Optional in profiling code

Change-Id: I048c538d4f8c21770aec2b2751c934d9fa15a4dc
Signed-off-by: Jim Flynn <jim.flynn@arm.com>
diff --git a/src/profiling/RegisterBackendCounters.cpp b/src/profiling/RegisterBackendCounters.cpp
index dcafe3b..79ffa20 100644
--- a/src/profiling/RegisterBackendCounters.cpp
+++ b/src/profiling/RegisterBackendCounters.cpp
@@ -18,7 +18,7 @@
 
 uint16_t RegisterBackendCounters::RegisterDevice(const std::string& deviceName,
                                                  uint16_t cores,
-                                                 const armnn::Optional<std::string>& parentCategoryName)
+                                                 const arm::pipe::Optional<std::string>& parentCategoryName)
 {
     const Device* devicePtr = m_CounterDirectory.RegisterDevice(deviceName, cores, parentCategoryName);
     return devicePtr->m_Uid;
@@ -26,7 +26,7 @@
 
 uint16_t RegisterBackendCounters::RegisterCounterSet(const std::string& counterSetName,
                                                      uint16_t count,
-                                                     const armnn::Optional<std::string>& parentCategoryName)
+                                                     const arm::pipe::Optional<std::string>& parentCategoryName)
 {
     const CounterSet* counterSetPtr = m_CounterDirectory.RegisterCounterSet(counterSetName, count, parentCategoryName);
     return counterSetPtr->m_Uid;
@@ -39,10 +39,10 @@
                                                   double multiplier,
                                                   const std::string& name,
                                                   const std::string& description,
-                                                  const armnn::Optional<std::string>& units,
-                                                  const armnn::Optional<uint16_t>& numberOfCores,
-                                                  const armnn::Optional<uint16_t>& deviceUid,
-                                                  const armnn::Optional<uint16_t>& counterSetUid)
+                                                  const arm::pipe::Optional<std::string>& units,
+                                                  const arm::pipe::Optional<uint16_t>& numberOfCores,
+                                                  const arm::pipe::Optional<uint16_t>& deviceUid,
+                                                  const arm::pipe::Optional<uint16_t>& counterSetUid)
 {
     ++m_CurrentMaxGlobalCounterID;
     const Counter* counterPtr = m_CounterDirectory.RegisterCounter(m_BackendId,