- Increases the minor number limitation for vbi devices from 223 to 255.
  This is in agreement with the minor number allocation specified in
  Documentation/devices.txt.

- Without this patch it is not possible to use more than 5 Hauppauge
  WinTV-PVR 350 cards since each of these allocate 3 vbi devices.
Signed-of-by: NSigmund Augdal Helberg <sigmund@snap.tv>
Signed-off-by: NMauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>