mac80211: reduce reliance on netdev

For bluetooth 3, we will most likely not have
a netdev for a virtual interface (sdata), so
prepare for that by reducing the reliance on
having a netdev. This patch moves the name
and address fields into the sdata struct and
uses them from there all over. Some work is
needed to keep them sync'ed, but that's not
a lot of work and in slow paths anyway.

In doing so, this also reduces the number of
pointer dereferences in many places, because
of things like sdata->dev->dev_addr becoming
sdata->vif.addr.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/pm.c

@@ -102,7 +102,7 @@ int __ieee80211_suspend(struct ieee80211_hw *hw)
 
 		conf.vif = &sdata->vif;
 		conf.type = sdata->vif.type;
-		conf.mac_addr = sdata->dev->dev_addr;
+		conf.mac_addr = sdata->vif.addr;
 		drv_remove_interface(local, &conf);
 	}