staging: vt6655: Fix kernel BUG on driver wpa initialization

In http://bugzilla.novell.com/show_bug.cgi?id=597299

, the vt6655 driver
generates a kernel BUG on a NULL pointer dereference at NULL. This problem
has been traced to a failure in the wpa_set_wpadev() routine. As the vt6656
driver does not call this routine, the vt6655 code is similarly set to skip
the call.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Tested-by: Richard Meek <osl2008@googlemail.com>
Cc: Stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>