- set ->devfs_name
- create initial devfs names slightly differently so
  as not to conflict
- re-read partition table when an array is assembled at boot
  time - not sure why this is needed, but it is.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>