iwlwifi: remove 4965 prefix from iwl4965_kw and iwl4965_tx_queue

This patch removes the 4965 prefix to form iwl_kw and iwl_tx_queue structs,
as they are used mostly in iwlcore now.

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>