staging: w35und: Add locking problems to TODO list

The w35und uses atomics such as "ThreadCount" and "FireCount" to emulate
locking in the TX paths, for example. Document this bug in the TODO list.

Cc: Lars Lindley <lindley@coyote.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Ruslan Pisarev <ruslan@rpisarev.org.ua>
Signed-off-by: NPekka Enberg <penberg@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/winbond/TODO

@@ -6,6 +6,7 @@ TODO:
 	- remove unused ioctls
 	- use cfg80211 for regulatory stuff
 	- fix 4k stack problems
+	- fix locking problems (it's done using atomics...)
 
 Please send patches to Greg Kroah-Hartman <greg@kroah.com> and
 Pavel Machek <pavel@ucw.cz>