The private memory variable was being by the module level

metadata. instead of the function metdata. This was creating
incorrect result in the patch tokens. Fixing that with this
change.

Change-Id: Ie08c29a36a4aeda301c160ed553647e5f7ee0828

Author: Rishipal Singh Bhatia

IGC/Compiler/CISACodeGen/OpenCLKernelCodeGen.cpp

@@ -1403,10 +1403,13 @@ void COpenCLKernel::AllocatePayload()
     // Set only if the private memory metadata actually exists and we don't use
     // scratch space for private memory.
     bool noScratchSpacePrivMem = !m_Context->getModuleMetaData()->compOpt.UseScratchSpacePrivateMemory;
-    if (noScratchSpacePrivMem && m_Context->getModuleMetaData()->privateMemoryPerWI) 
+
+    auto funcMD = m_Context->getModuleMetaData()->FuncMD.find(entry);
+    if (noScratchSpacePrivMem && (funcMD != m_Context->getModuleMetaData()->FuncMD.end()) && funcMD->second.privateMemoryPerWI)
     {
-        m_perWIPrivateMemSize = m_Context->getModuleMetaData()->privateMemoryPerWI;
+        m_perWIPrivateMemSize = funcMD->second.privateMemoryPerWI;
     }
+    
 
     m_ConstantBufferLength  = 0;
     m_NOSBufferSize         = 0;