reiserfs: mailing list has moved

This patch changes MAINTAINERS to reflect the new location of the reiserfs
development mailing list.  The old list forwards to the new one.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>