Fix file references in documentation and Kconfig

Fix typo in arch/powerpc/boot/flatdevtree_env.h.
There is no Documentation/networking/ixgbe.txt.

README.cycladesZ is now in Documentation/.
wavelan.p.h is now in drivers/net/wireless/.
HFS.txt is now Documentation/filesystems/hfs.txt.
OSS-files are now in sound/oss/.

Signed-off-by: Johann Felix Soden <johfel@users.sourceforge.net>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/Kconfig b/fs/Kconfig
index 487236c..781b47d 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -1112,8 +1112,8 @@
 	help
 	  If you say Y here, you will be able to mount Macintosh-formatted
 	  floppy disks and hard drive partitions with full read-write access.
-	  Please read <file:fs/hfs/HFS.txt> to learn about the available mount
-	  options.
+	  Please read <file:Documentation/filesystems/hfs.txt> to learn about
+	  the available mount options.
 
 	  To compile this file system support as a module, choose M here: the
 	  module will be called hfs.