staging: vt6655: mac80211 conversion add main mac80211 functions

Replace existing vt6655_probe with one converted to mac80211
with the following operations

vnt_tx_80211
vnt_start
vnt_stop
vnt_add_interface
vnt_remove_interface
vnt_config
vnt_bss_info_changed
vnt_prepare_multicast
vnt_configure
vnt_set_key
vnt_get_tsf
vnt_set_tsf
vnt_reset_tsf

The following variables are also added.
basic_rates
mc_list_count
mac_hw
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/device.h

@@ -324,7 +324,10 @@ struct vnt_private {
 	struct ieee80211_hw *hw;
 	struct ieee80211_vif *vif;
 	unsigned long key_entry_inuse;
+	u32 basic_rates;
 	u16 current_aid;
+	int mc_list_count;
+	u8 mac_hw;
 /* netdev */
 	struct net_device *dev;