SWDEV-308644 - reorganize extra blit kernel in PAL stack

Change-Id: I9d853e8d417ef75b522184d83646ec4b9fa8669b

rocclr/device/device.hpp

@@ -1533,7 +1533,7 @@ class Device : public RuntimeObject {
     //! Creates blit program for this device
     bool create(Device* device,                  //!< Device object
                 const std::string& extraKernel,  //!< Extra kernels from the device layer
-                const char* extraOptions = NULL  //!< Extra compilation options
+                const std::string& extraOptions  //!< Extra compilation options
     );
   };