In md, there are "level" number and "personality" numbers.  LEVEL_MULTIPATH
is the level number for multipath.  MULTIPATH is the personality number for
multipath.

In one place, we compare the level with a personality ...  bad

This makes it impossible to assemble multipath arrays.
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>