[PATCH] md: fix duplicity of levels in md.txt

md.txt has two sections describing the 'level' sysfs attribute, and some of
the text is out-of-date.  So make just one section, and make it right.

Cc: Christian Kujau <evil@g-house.de>
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Documentation/md.txt

@@ -154,11 +154,12 @@ contains further md-specific information about the device.
 
 All md devices contain:
   level
-     a text file indicating the 'raid level'.  This may be a standard
-     numerical level prefixed by "RAID-" - e.g. "RAID-5", or some
-     other name such as "linear" or "multipath".
+     a text file indicating the 'raid level'. e.g. raid0, raid1,
+     raid5, linear, multipath, faulty.
      If no raid level has been set yet (array is still being
-     assembled), this file will be empty.
+     assembled), the value will reflect whatever has been written
+     to it, which may be a name like the above, or may be a number
+     such as '0', '5', etc.
 
   raid_disks
      a text file with a simple number indicating the number of devices
@@ -192,14 +193,6 @@ All md devices contain:
      1.2 (newer format in varying locations) or "none" indicating that
      the kernel isn't managing metadata at all.
 
-  level
-     The raid 'level' for this array.  The name will often (but not
-     always) be the same as the name of the module that implements the
-     level.  To be auto-loaded the module must have an alias
-        md-$LEVEL  e.g. md-raid5
-     This can be written only while the array is being assembled, not
-     after it is started.
-
   layout
      The "layout" for the array for the particular level.  This is
      simply a number that is interpretted differently by different