If I mount ext2 "rw", I want it to say "rw", not "rw,nogrpid".

I caught this writing an automated regression test script for the busybox
mount command.  The symptom is
  /dev/loop0 on /images/ext2.dir type ext2 (rw,nogrpid)
instead of:
  /dev/loop0 on /images/ext2.dir type ext2 (rw)

The behavior was introduced by git commit
8fc2751b.

Signed-off-by: Rob Landley <rob@landley.net>
Cc: Mark Bellon <mbellon@mvista.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>