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>

sound/oss/Kconfig

@@ -75,7 +75,7 @@ config SOUND_TRIDENT
 
 
 	  This driver differs slightly from OSS/Free, so PLEASE READ the
-	  comments at the top of <file:drivers/sound/trident.c>.
+	  comments at the top of <file:sound/oss/trident.c>.
 
 config SOUND_MSNDCLAS
 	tristate "Support for Turtle Beach MultiSound Classic, Tahiti, Monterey"
@@ -564,7 +564,7 @@ config SOUND_AEDSP16
 	  questions.
 
 	  Read the <file:Documentation/sound/oss/README.OSS> file and the head of
-	  <file:drivers/sound/aedsp16.c> as well as
+	  <file:sound/oss/aedsp16.c> as well as
 	  <file:Documentation/sound/oss/AudioExcelDSP16> to get more information
 	  about this driver and its configuration.