[PATCH] ipw2200: Fix software crypto shared WEP authentication problem

We didn't set the WEP key to hardware when we are using software based
crypto. Hardware needs the key to do WEP authentication even for
software based encryption.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>