staging: vt6655:fix warning for unexported non-static functions

There is one function in aes_ccmp.c which is exported, but sparse sees
it unexported because it doesn't include the header that exports it.
Signed-off-by: Guillaume Clement <gclement@baobob.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/aes_ccmp.c

@@ -35,6 +35,7 @@
 
 #include "device.h"
 #include "80211hdr.h"
+#include "aes_ccmp.h"
 
 /*---------------------  Static Definitions -------------------------*/