[media] cx88: don't declare restart_video_queue if not used

While compiled on alpha, got this error:
	drivers/media/pci/cx88/cx88-video.c:415:12: warning: 'restart_video_queue' defined but not used [-Wunused-function]
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/pci/cx88/cx88-video.c

@@ -410,7 +410,6 @@ static int stop_video_dma(struct cx8800_dev    *dev)
 	cx_clear(MO_VID_INTMSK, 0x0f0011);
 	return 0;
 }
-#endif
 
 static int restart_video_queue(struct cx8800_dev    *dev,
 			       struct cx88_dmaqueue *q)
@@ -426,6 +425,7 @@ static int restart_video_queue(struct cx8800_dev    *dev,
 	}
 	return 0;
 }
+#endif
 
 /* ------------------------------------------------------------------ */