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/drivers/char/Kconfig b/drivers/char/Kconfig
index ef1ed5d7..2e3a0d4b 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -137,7 +137,7 @@
 	  your Linux box, for instance in order to become a dial-in server.
 
 	  For information about the Cyclades-Z card, read
-	  <file:drivers/char/README.cycladesZ>.
+	  <file:Documentation/README.cycladesZ>.
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called cyclades.