Remove the last few UMSDOS leftovers

The UMSDOS filesystem was removed back in 2.6.11, but some tiny bits stuck
around.  This patch removes the few remaining leftovers.  The only things
left behind after this are the entries in the CREDITS file and the ioctl
number in Documentation/ioctl-number.txt as documentation.

This third (hopefully final) version of the patch doesn't edit the
arch/um/config.release file, since Jeff Dike pointed out to me that it
should die completely, and asked me to remove it from my patch as he'll
send in a seperate patch removing the file completely.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/Documentation/ioctl-number.txt b/Documentation/ioctl-number.txt
index 3de7d37..5c7fbf9 100644
--- a/Documentation/ioctl-number.txt
+++ b/Documentation/ioctl-number.txt
@@ -67,7 +67,7 @@
 0x00	00-1F	linux/wavefront.h	conflict!
 0x02	all	linux/fd.h
 0x03	all	linux/hdreg.h
-0x04	all	linux/umsdos_fs.h
+0x04	D2-DC	linux/umsdos_fs.h	Dead since 2.6.11, but don't reuse these.
 0x06	all	linux/lp.h
 0x09	all	linux/md.h
 0x12	all	linux/fs.h