[g3dvl] make resource_format param const

src/gallium/auxiliary/vl/vl_context.c

@@ -199,7 +199,7 @@ vl_context_create_decoder(struct pipe_video_context *context,
 static struct pipe_video_buffer *
 vl_context_create_buffer(struct pipe_video_context *context,
                          enum pipe_format buffer_format,
-                         enum pipe_format resource_formats[3],
+                         const enum pipe_format resource_formats[3],
                          enum pipe_video_chroma_format chroma_format,
                          unsigned width, unsigned height)
 {

src/gallium/include/pipe/p_video_context.h

@@ -121,7 +121,7 @@ struct pipe_video_context
     */
    struct pipe_video_buffer *(*create_buffer)(struct pipe_video_context *context,
                                               enum pipe_format buffer_format,
-                                              enum pipe_format resource_formats[3],
+                                              const enum pipe_format resource_formats[3],
                                               enum pipe_video_chroma_format chroma_format,
                                               unsigned width, unsigned height);