SWDEV-273265 - Reverting wrong scope resolution operator VirtualGpu in the declaration releaseGpuMemoryFence()

Change-Id: Ia67ee1e4a3e86235caf8b7c585c65372f7d55426

rocclr/device/pal/palvirtual.hpp

@@ -556,7 +556,7 @@ class VirtualGPU : public device::VirtualDevice {
   void* getOrCreateHostcallBuffer();
 
   //! Waits on an outstanding kernel.
-  void VirtualGPU::releaseGpuMemoryFence();
+  void releaseGpuMemoryFence();
 
   //! Returns true if a dispatch is pending.
   bool isPendingDispatch() const { return state_.hasPendingDispatch_; }