refine csc module.

make _output_format can only change follow with _csc_type.

Signed-off-by: Wind Yuan <feng.yuan@intel.com>
diff --git a/xcore/cl_csc_handler.h b/xcore/cl_csc_handler.h
index 8c6e86a..35d730d 100644
--- a/xcore/cl_csc_handler.h
+++ b/xcore/cl_csc_handler.h
@@ -54,9 +54,7 @@
     : public CLImageHandler
 {
 public:
-    explicit CLCscImageHandler (const char *name);
-    bool set_output_format (uint32_t fourcc);
-    bool set_csc_type(CLCscType type);
+    explicit CLCscImageHandler (const char *name, CLCscType type);
 
 protected:
     virtual XCamReturn prepare_buffer_pool_video_info (