add new line at the end of device_gemm_xdl_instance.hpp

device_operation/include/device_gemm_xdl_instance.hpp

@@ -77,4 +77,4 @@ void add_device_gemm_instance<ck::half_t,
 } // namespace device
 } // namespace tensor_operation
 } // namespace ck
-#endif
\ No newline at end of file
+#endif