More fixups and improvements on the video driver

This patch afixes several driver bugs
* Make the windows disabled by default at module load and unload
* Enable the attribute window
* Change the order of the windows, now osd0 is fb0, so the video mode change
  must be done on vid0 which is fb1
* Remove more unsued code
* Make the enable_digital output to not change the window configurations
* Add a new ioctl to enable color bar test mode
* Fix some of the rules of the check_var function, now the virtual size of the
  window is handled automatic based on the 32 bytes align constraints

include/video/davincifb.h

@@ -433,9 +433,9 @@
 
 enum
 {
+	DAVINCIFB_WIN_OSD0,
 	DAVINCIFB_WIN_VID0,
 	DAVINCIFB_WIN_VID1,
-	DAVINCIFB_WIN_OSD0,
 	DAVINCIFB_WIN_OSD1,
 	DAVINCIFB_WINDOWS
 };
@@ -482,4 +482,5 @@ struct zoom_params
 #define FBIO_ENABLE 		_IOW('F', 0x26, u_int32_t)
 #define FBIO_TRANSP 		_IOW('F', 0x27, u_int32_t)
 #define FBIO_TRANSP_COLOR	_IOW('F', 0x28, u_int32_t)
+#define FBIO_CBTEST		_IOW('F', 0x29, u_int32_t)
 #endif /* _DAVINCIFB_H_ */